Merge branch 'main' into feat/api-key-ip-restriction

backend/ent/promocode_query.go

+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"database/sql/driver"
+	"fmt"
+	"math"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+)
+
+// PromoCodeQuery is the builder for querying PromoCode entities.
+type PromoCodeQuery struct {
+	config
+	ctx              *QueryContext
+	order            []promocode.OrderOption
+	inters           []Interceptor
+	predicates       []predicate.PromoCode
+	withUsageRecords *PromoCodeUsageQuery
+	modifiers        []func(*sql.Selector)
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the PromoCodeQuery builder.
+func (_q *PromoCodeQuery) Where(ps ...predicate.PromoCode) *PromoCodeQuery {
+	_q.predicates = append(_q.predicates, ps...)
+	return _q
+}
+
+// Limit the number of records to be returned by this query.
+func (_q *PromoCodeQuery) Limit(limit int) *PromoCodeQuery {
+	_q.ctx.Limit = &limit
+	return _q
+}
+
+// Offset to start from.
+func (_q *PromoCodeQuery) Offset(offset int) *PromoCodeQuery {
+	_q.ctx.Offset = &offset
+	return _q
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (_q *PromoCodeQuery) Unique(unique bool) *PromoCodeQuery {
+	_q.ctx.Unique = &unique
+	return _q
+}
+
+// Order specifies how the records should be ordered.
+func (_q *PromoCodeQuery) Order(o ...promocode.OrderOption) *PromoCodeQuery {
+	_q.order = append(_q.order, o...)
+	return _q
+}
+
+// QueryUsageRecords chains the current query on the "usage_records" edge.
+func (_q *PromoCodeQuery) QueryUsageRecords() *PromoCodeUsageQuery {
+	query := (&PromoCodeUsageClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocode.Table, promocode.FieldID, selector),
+			sqlgraph.To(promocodeusage.Table, promocodeusage.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, promocode.UsageRecordsTable, promocode.UsageRecordsColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first PromoCode entity from the query.
+// Returns a *NotFoundError when no PromoCode was found.
+func (_q *PromoCodeQuery) First(ctx context.Context) (*PromoCode, error) {
+	nodes, err := _q.Limit(1).All(setContextOp(ctx, _q.ctx, ent.OpQueryFirst))
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{promocode.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (_q *PromoCodeQuery) FirstX(ctx context.Context) *PromoCode {
+	node, err := _q.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first PromoCode ID from the query.
+// Returns a *NotFoundError when no PromoCode ID was found.
+func (_q *PromoCodeQuery) FirstID(ctx context.Context) (id int64, err error) {
+	var ids []int64
+	if ids, err = _q.Limit(1).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryFirstID)); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{promocode.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (_q *PromoCodeQuery) FirstIDX(ctx context.Context) int64 {
+	id, err := _q.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single PromoCode entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one PromoCode entity is found.
+// Returns a *NotFoundError when no PromoCode entities are found.
+func (_q *PromoCodeQuery) Only(ctx context.Context) (*PromoCode, error) {
+	nodes, err := _q.Limit(2).All(setContextOp(ctx, _q.ctx, ent.OpQueryOnly))
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{promocode.Label}
+	default:
+		return nil, &NotSingularError{promocode.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (_q *PromoCodeQuery) OnlyX(ctx context.Context) *PromoCode {
+	node, err := _q.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only PromoCode ID in the query.
+// Returns a *NotSingularError when more than one PromoCode ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (_q *PromoCodeQuery) OnlyID(ctx context.Context) (id int64, err error) {
+	var ids []int64
+	if ids, err = _q.Limit(2).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryOnlyID)); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{promocode.Label}
+	default:
+		err = &NotSingularError{promocode.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (_q *PromoCodeQuery) OnlyIDX(ctx context.Context) int64 {
+	id, err := _q.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of PromoCodes.
+func (_q *PromoCodeQuery) All(ctx context.Context) ([]*PromoCode, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryAll)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	qr := querierAll[[]*PromoCode, *PromoCodeQuery]()
+	return withInterceptors[[]*PromoCode](ctx, _q, qr, _q.inters)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (_q *PromoCodeQuery) AllX(ctx context.Context) []*PromoCode {
+	nodes, err := _q.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of PromoCode IDs.
+func (_q *PromoCodeQuery) IDs(ctx context.Context) (ids []int64, err error) {
+	if _q.ctx.Unique == nil && _q.path != nil {
+		_q.Unique(true)
+	}
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryIDs)
+	if err = _q.Select(promocode.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (_q *PromoCodeQuery) IDsX(ctx context.Context) []int64 {
+	ids, err := _q.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (_q *PromoCodeQuery) Count(ctx context.Context) (int, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryCount)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return withInterceptors[int](ctx, _q, querierCount[*PromoCodeQuery](), _q.inters)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (_q *PromoCodeQuery) CountX(ctx context.Context) int {
+	count, err := _q.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (_q *PromoCodeQuery) Exist(ctx context.Context) (bool, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryExist)
+	switch _, err := _q.FirstID(ctx); {
+	case IsNotFound(err):
+		return false, nil
+	case err != nil:
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	default:
+		return true, nil
+	}
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (_q *PromoCodeQuery) ExistX(ctx context.Context) bool {
+	exist, err := _q.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the PromoCodeQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (_q *PromoCodeQuery) Clone() *PromoCodeQuery {
+	if _q == nil {
+		return nil
+	}
+	return &PromoCodeQuery{
+		config:           _q.config,
+		ctx:              _q.ctx.Clone(),
+		order:            append([]promocode.OrderOption{}, _q.order...),
+		inters:           append([]Interceptor{}, _q.inters...),
+		predicates:       append([]predicate.PromoCode{}, _q.predicates...),
+		withUsageRecords: _q.withUsageRecords.Clone(),
+		// clone intermediate query.
+		sql:  _q.sql.Clone(),
+		path: _q.path,
+	}
+}
+
+// WithUsageRecords tells the query-builder to eager-load the nodes that are connected to
+// the "usage_records" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *PromoCodeQuery) WithUsageRecords(opts ...func(*PromoCodeUsageQuery)) *PromoCodeQuery {
+	query := (&PromoCodeUsageClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withUsageRecords = query
+	return _q
+}
+
+// GroupBy is used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		Code string `json:"code,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.PromoCode.Query().
+//		GroupBy(promocode.FieldCode).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (_q *PromoCodeQuery) GroupBy(field string, fields ...string) *PromoCodeGroupBy {
+	_q.ctx.Fields = append([]string{field}, fields...)
+	grbuild := &PromoCodeGroupBy{build: _q}
+	grbuild.flds = &_q.ctx.Fields
+	grbuild.label = promocode.Label
+	grbuild.scan = grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		Code string `json:"code,omitempty"`
+//	}
+//
+//	client.PromoCode.Query().
+//		Select(promocode.FieldCode).
+//		Scan(ctx, &v)
+func (_q *PromoCodeQuery) Select(fields ...string) *PromoCodeSelect {
+	_q.ctx.Fields = append(_q.ctx.Fields, fields...)
+	sbuild := &PromoCodeSelect{PromoCodeQuery: _q}
+	sbuild.label = promocode.Label
+	sbuild.flds, sbuild.scan = &_q.ctx.Fields, sbuild.Scan
+	return sbuild
+}
+
+// Aggregate returns a PromoCodeSelect configured with the given aggregations.
+func (_q *PromoCodeQuery) Aggregate(fns ...AggregateFunc) *PromoCodeSelect {
+	return _q.Select().Aggregate(fns...)
+}
+
+func (_q *PromoCodeQuery) prepareQuery(ctx context.Context) error {
+	for _, inter := range _q.inters {
+		if inter == nil {
+			return fmt.Errorf("ent: uninitialized interceptor (forgotten import ent/runtime?)")
+		}
+		if trv, ok := inter.(Traverser); ok {
+			if err := trv.Traverse(ctx, _q); err != nil {
+				return err
+			}
+		}
+	}
+	for _, f := range _q.ctx.Fields {
+		if !promocode.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if _q.path != nil {
+		prev, err := _q.path(ctx)
+		if err != nil {
+			return err
+		}
+		_q.sql = prev
+	}
+	return nil
+}
+
+func (_q *PromoCodeQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*PromoCode, error) {
+	var (
+		nodes       = []*PromoCode{}
+		_spec       = _q.querySpec()
+		loadedTypes = [1]bool{
+			_q.withUsageRecords != nil,
+		}
+	)
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*PromoCode).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &PromoCode{config: _q.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, _q.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := _q.withUsageRecords; query != nil {
+		if err := _q.loadUsageRecords(ctx, query, nodes,
+			func(n *PromoCode) { n.Edges.UsageRecords = []*PromoCodeUsage{} },
+			func(n *PromoCode, e *PromoCodeUsage) { n.Edges.UsageRecords = append(n.Edges.UsageRecords, e) }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (_q *PromoCodeQuery) loadUsageRecords(ctx context.Context, query *PromoCodeUsageQuery, nodes []*PromoCode, init func(*PromoCode), assign func(*PromoCode, *PromoCodeUsage)) error {
+	fks := make([]driver.Value, 0, len(nodes))
+	nodeids := make(map[int64]*PromoCode)
+	for i := range nodes {
+		fks = append(fks, nodes[i].ID)
+		nodeids[nodes[i].ID] = nodes[i]
+		if init != nil {
+			init(nodes[i])
+		}
+	}
+	if len(query.ctx.Fields) > 0 {
+		query.ctx.AppendFieldOnce(promocodeusage.FieldPromoCodeID)
+	}
+	query.Where(predicate.PromoCodeUsage(func(s *sql.Selector) {
+		s.Where(sql.InValues(s.C(promocode.UsageRecordsColumn), fks...))
+	}))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		fk := n.PromoCodeID
+		node, ok := nodeids[fk]
+		if !ok {
+			return fmt.Errorf(`unexpected referenced foreign-key "promo_code_id" returned %v for node %v`, fk, n.ID)
+		}
+		assign(node, n)
+	}
+	return nil
+}
+
+func (_q *PromoCodeQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
+	_spec.Node.Columns = _q.ctx.Fields
+	if len(_q.ctx.Fields) > 0 {
+		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
+	}
+	return sqlgraph.CountNodes(ctx, _q.driver, _spec)
+}
+
+func (_q *PromoCodeQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := sqlgraph.NewQuerySpec(promocode.Table, promocode.Columns, sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64))
+	_spec.From = _q.sql
+	if unique := _q.ctx.Unique; unique != nil {
+		_spec.Unique = *unique
+	} else if _q.path != nil {
+		_spec.Unique = true
+	}
+	if fields := _q.ctx.Fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, promocode.FieldID)
+		for i := range fields {
+			if fields[i] != promocode.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+	}
+	if ps := _q.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := _q.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (_q *PromoCodeQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(_q.driver.Dialect())
+	t1 := builder.Table(promocode.Table)
+	columns := _q.ctx.Fields
+	if len(columns) == 0 {
+		columns = promocode.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if _q.sql != nil {
+		selector = _q.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if _q.ctx.Unique != nil && *_q.ctx.Unique {
+		selector.Distinct()
+	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
+	for _, p := range _q.predicates {
+		p(selector)
+	}
+	for _, p := range _q.order {
+		p(selector)
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		// limit is mandatory for offset clause. We start
+		// with default value, and override it below if needed.
+		selector.Offset(*offset).Limit(math.MaxInt32)
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *PromoCodeQuery) ForUpdate(opts ...sql.LockOption) *PromoCodeQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *PromoCodeQuery) ForShare(opts ...sql.LockOption) *PromoCodeQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
+// PromoCodeGroupBy is the group-by builder for PromoCode entities.
+type PromoCodeGroupBy struct {
+	selector
+	build *PromoCodeQuery
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (_g *PromoCodeGroupBy) Aggregate(fns ...AggregateFunc) *PromoCodeGroupBy {
+	_g.fns = append(_g.fns, fns...)
+	return _g
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_g *PromoCodeGroupBy) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _g.build.ctx, ent.OpQueryGroupBy)
+	if err := _g.build.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PromoCodeQuery, *PromoCodeGroupBy](ctx, _g.build, _g, _g.build.inters, v)
+}
+
+func (_g *PromoCodeGroupBy) sqlScan(ctx context.Context, root *PromoCodeQuery, v any) error {
+	selector := root.sqlQuery(ctx).Select()
+	aggregation := make([]string, 0, len(_g.fns))
+	for _, fn := range _g.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(*_g.flds)+len(_g.fns))
+		for _, f := range *_g.flds {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	selector.GroupBy(selector.Columns(*_g.flds...)...)
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _g.build.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+// PromoCodeSelect is the builder for selecting fields of PromoCode entities.
+type PromoCodeSelect struct {
+	*PromoCodeQuery
+	selector
+}
+
+// Aggregate adds the given aggregation functions to the selector query.
+func (_s *PromoCodeSelect) Aggregate(fns ...AggregateFunc) *PromoCodeSelect {
+	_s.fns = append(_s.fns, fns...)
+	return _s
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_s *PromoCodeSelect) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _s.ctx, ent.OpQuerySelect)
+	if err := _s.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PromoCodeQuery, *PromoCodeSelect](ctx, _s.PromoCodeQuery, _s, _s.inters, v)
+}
+
+func (_s *PromoCodeSelect) sqlScan(ctx context.Context, root *PromoCodeQuery, v any) error {
+	selector := root.sqlQuery(ctx)
+	aggregation := make([]string, 0, len(_s.fns))
+	for _, fn := range _s.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	switch n := len(*_s.selector.flds); {
+	case n == 0 && len(aggregation) > 0:
+		selector.Select(aggregation...)
+	case n != 0 && len(aggregation) > 0:
+		selector.AppendSelect(aggregation...)
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _s.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}

backend/ent/promocode_update.go

+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+)
+
+// PromoCodeUpdate is the builder for updating PromoCode entities.
+type PromoCodeUpdate struct {
+	config
+	hooks    []Hook
+	mutation *PromoCodeMutation
+}
+
+// Where appends a list predicates to the PromoCodeUpdate builder.
+func (_u *PromoCodeUpdate) Where(ps ...predicate.PromoCode) *PromoCodeUpdate {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// SetCode sets the "code" field.
+func (_u *PromoCodeUpdate) SetCode(v string) *PromoCodeUpdate {
+	_u.mutation.SetCode(v)
+	return _u
+}
+
+// SetNillableCode sets the "code" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableCode(v *string) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetCode(*v)
+	}
+	return _u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_u *PromoCodeUpdate) SetBonusAmount(v float64) *PromoCodeUpdate {
+	_u.mutation.ResetBonusAmount()
+	_u.mutation.SetBonusAmount(v)
+	return _u
+}
+
+// SetNillableBonusAmount sets the "bonus_amount" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableBonusAmount(v *float64) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetBonusAmount(*v)
+	}
+	return _u
+}
+
+// AddBonusAmount adds value to the "bonus_amount" field.
+func (_u *PromoCodeUpdate) AddBonusAmount(v float64) *PromoCodeUpdate {
+	_u.mutation.AddBonusAmount(v)
+	return _u
+}
+
+// SetMaxUses sets the "max_uses" field.
+func (_u *PromoCodeUpdate) SetMaxUses(v int) *PromoCodeUpdate {
+	_u.mutation.ResetMaxUses()
+	_u.mutation.SetMaxUses(v)
+	return _u
+}
+
+// SetNillableMaxUses sets the "max_uses" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableMaxUses(v *int) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetMaxUses(*v)
+	}
+	return _u
+}
+
+// AddMaxUses adds value to the "max_uses" field.
+func (_u *PromoCodeUpdate) AddMaxUses(v int) *PromoCodeUpdate {
+	_u.mutation.AddMaxUses(v)
+	return _u
+}
+
+// SetUsedCount sets the "used_count" field.
+func (_u *PromoCodeUpdate) SetUsedCount(v int) *PromoCodeUpdate {
+	_u.mutation.ResetUsedCount()
+	_u.mutation.SetUsedCount(v)
+	return _u
+}
+
+// SetNillableUsedCount sets the "used_count" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableUsedCount(v *int) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetUsedCount(*v)
+	}
+	return _u
+}
+
+// AddUsedCount adds value to the "used_count" field.
+func (_u *PromoCodeUpdate) AddUsedCount(v int) *PromoCodeUpdate {
+	_u.mutation.AddUsedCount(v)
+	return _u
+}
+
+// SetStatus sets the "status" field.
+func (_u *PromoCodeUpdate) SetStatus(v string) *PromoCodeUpdate {
+	_u.mutation.SetStatus(v)
+	return _u
+}
+
+// SetNillableStatus sets the "status" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableStatus(v *string) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetStatus(*v)
+	}
+	return _u
+}
+
+// SetExpiresAt sets the "expires_at" field.
+func (_u *PromoCodeUpdate) SetExpiresAt(v time.Time) *PromoCodeUpdate {
+	_u.mutation.SetExpiresAt(v)
+	return _u
+}
+
+// SetNillableExpiresAt sets the "expires_at" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableExpiresAt(v *time.Time) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetExpiresAt(*v)
+	}
+	return _u
+}
+
+// ClearExpiresAt clears the value of the "expires_at" field.
+func (_u *PromoCodeUpdate) ClearExpiresAt() *PromoCodeUpdate {
+	_u.mutation.ClearExpiresAt()
+	return _u
+}
+
+// SetNotes sets the "notes" field.
+func (_u *PromoCodeUpdate) SetNotes(v string) *PromoCodeUpdate {
+	_u.mutation.SetNotes(v)
+	return _u
+}
+
+// SetNillableNotes sets the "notes" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableNotes(v *string) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetNotes(*v)
+	}
+	return _u
+}
+
+// ClearNotes clears the value of the "notes" field.
+func (_u *PromoCodeUpdate) ClearNotes() *PromoCodeUpdate {
+	_u.mutation.ClearNotes()
+	return _u
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (_u *PromoCodeUpdate) SetUpdatedAt(v time.Time) *PromoCodeUpdate {
+	_u.mutation.SetUpdatedAt(v)
+	return _u
+}
+
+// AddUsageRecordIDs adds the "usage_records" edge to the PromoCodeUsage entity by IDs.
+func (_u *PromoCodeUpdate) AddUsageRecordIDs(ids ...int64) *PromoCodeUpdate {
+	_u.mutation.AddUsageRecordIDs(ids...)
+	return _u
+}
+
+// AddUsageRecords adds the "usage_records" edges to the PromoCodeUsage entity.
+func (_u *PromoCodeUpdate) AddUsageRecords(v ...*PromoCodeUsage) *PromoCodeUpdate {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddUsageRecordIDs(ids...)
+}
+
+// Mutation returns the PromoCodeMutation object of the builder.
+func (_u *PromoCodeUpdate) Mutation() *PromoCodeMutation {
+	return _u.mutation
+}
+
+// ClearUsageRecords clears all "usage_records" edges to the PromoCodeUsage entity.
+func (_u *PromoCodeUpdate) ClearUsageRecords() *PromoCodeUpdate {
+	_u.mutation.ClearUsageRecords()
+	return _u
+}
+
+// RemoveUsageRecordIDs removes the "usage_records" edge to PromoCodeUsage entities by IDs.
+func (_u *PromoCodeUpdate) RemoveUsageRecordIDs(ids ...int64) *PromoCodeUpdate {
+	_u.mutation.RemoveUsageRecordIDs(ids...)
+	return _u
+}
+
+// RemoveUsageRecords removes "usage_records" edges to PromoCodeUsage entities.
+func (_u *PromoCodeUpdate) RemoveUsageRecords(v ...*PromoCodeUsage) *PromoCodeUpdate {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveUsageRecordIDs(ids...)
+}
+
+// Save executes the query and returns the number of nodes affected by the update operation.
+func (_u *PromoCodeUpdate) Save(ctx context.Context) (int, error) {
+	_u.defaults()
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *PromoCodeUpdate) SaveX(ctx context.Context) int {
+	affected, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return affected
+}
+
+// Exec executes the query.
+func (_u *PromoCodeUpdate) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *PromoCodeUpdate) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// defaults sets the default values of the builder before save.
+func (_u *PromoCodeUpdate) defaults() {
+	if _, ok := _u.mutation.UpdatedAt(); !ok {
+		v := promocode.UpdateDefaultUpdatedAt()
+		_u.mutation.SetUpdatedAt(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *PromoCodeUpdate) check() error {
+	if v, ok := _u.mutation.Code(); ok {
+		if err := promocode.CodeValidator(v); err != nil {
+			return &ValidationError{Name: "code", err: fmt.Errorf(`ent: validator failed for field "PromoCode.code": %w`, err)}
+		}
+	}
+	if v, ok := _u.mutation.Status(); ok {
+		if err := promocode.StatusValidator(v); err != nil {
+			return &ValidationError{Name: "status", err: fmt.Errorf(`ent: validator failed for field "PromoCode.status": %w`, err)}
+		}
+	}
+	return nil
+}
+
+func (_u *PromoCodeUpdate) sqlSave(ctx context.Context) (_node int, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(promocode.Table, promocode.Columns, sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64))
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.Code(); ok {
+		_spec.SetField(promocode.FieldCode, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.BonusAmount(); ok {
+		_spec.SetField(promocode.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.AddedBonusAmount(); ok {
+		_spec.AddField(promocode.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.MaxUses(); ok {
+		_spec.SetField(promocode.FieldMaxUses, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.AddedMaxUses(); ok {
+		_spec.AddField(promocode.FieldMaxUses, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.UsedCount(); ok {
+		_spec.SetField(promocode.FieldUsedCount, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.AddedUsedCount(); ok {
+		_spec.AddField(promocode.FieldUsedCount, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.Status(); ok {
+		_spec.SetField(promocode.FieldStatus, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.ExpiresAt(); ok {
+		_spec.SetField(promocode.FieldExpiresAt, field.TypeTime, value)
+	}
+	if _u.mutation.ExpiresAtCleared() {
+		_spec.ClearField(promocode.FieldExpiresAt, field.TypeTime)
+	}
+	if value, ok := _u.mutation.Notes(); ok {
+		_spec.SetField(promocode.FieldNotes, field.TypeString, value)
+	}
+	if _u.mutation.NotesCleared() {
+		_spec.ClearField(promocode.FieldNotes, field.TypeString)
+	}
+	if value, ok := _u.mutation.UpdatedAt(); ok {
+		_spec.SetField(promocode.FieldUpdatedAt, field.TypeTime, value)
+	}
+	if _u.mutation.UsageRecordsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedUsageRecordsIDs(); len(nodes) > 0 && !_u.mutation.UsageRecordsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UsageRecordsIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _node, err = sqlgraph.UpdateNodes(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{promocode.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return 0, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}
+
+// PromoCodeUpdateOne is the builder for updating a single PromoCode entity.
+type PromoCodeUpdateOne struct {
+	config
+	fields   []string
+	hooks    []Hook
+	mutation *PromoCodeMutation
+}
+
+// SetCode sets the "code" field.
+func (_u *PromoCodeUpdateOne) SetCode(v string) *PromoCodeUpdateOne {
+	_u.mutation.SetCode(v)
+	return _u
+}
+
+// SetNillableCode sets the "code" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableCode(v *string) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetCode(*v)
+	}
+	return _u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_u *PromoCodeUpdateOne) SetBonusAmount(v float64) *PromoCodeUpdateOne {
+	_u.mutation.ResetBonusAmount()
+	_u.mutation.SetBonusAmount(v)
+	return _u
+}
+
+// SetNillableBonusAmount sets the "bonus_amount" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableBonusAmount(v *float64) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetBonusAmount(*v)
+	}
+	return _u
+}
+
+// AddBonusAmount adds value to the "bonus_amount" field.
+func (_u *PromoCodeUpdateOne) AddBonusAmount(v float64) *PromoCodeUpdateOne {
+	_u.mutation.AddBonusAmount(v)
+	return _u
+}
+
+// SetMaxUses sets the "max_uses" field.
+func (_u *PromoCodeUpdateOne) SetMaxUses(v int) *PromoCodeUpdateOne {
+	_u.mutation.ResetMaxUses()
+	_u.mutation.SetMaxUses(v)
+	return _u
+}
+
+// SetNillableMaxUses sets the "max_uses" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableMaxUses(v *int) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetMaxUses(*v)
+	}
+	return _u
+}
+
+// AddMaxUses adds value to the "max_uses" field.
+func (_u *PromoCodeUpdateOne) AddMaxUses(v int) *PromoCodeUpdateOne {
+	_u.mutation.AddMaxUses(v)
+	return _u
+}
+
+// SetUsedCount sets the "used_count" field.
+func (_u *PromoCodeUpdateOne) SetUsedCount(v int) *PromoCodeUpdateOne {
+	_u.mutation.ResetUsedCount()
+	_u.mutation.SetUsedCount(v)
+	return _u
+}
+
+// SetNillableUsedCount sets the "used_count" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableUsedCount(v *int) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetUsedCount(*v)
+	}
+	return _u
+}
+
+// AddUsedCount adds value to the "used_count" field.
+func (_u *PromoCodeUpdateOne) AddUsedCount(v int) *PromoCodeUpdateOne {
+	_u.mutation.AddUsedCount(v)
+	return _u
+}
+
+// SetStatus sets the "status" field.
+func (_u *PromoCodeUpdateOne) SetStatus(v string) *PromoCodeUpdateOne {
+	_u.mutation.SetStatus(v)
+	return _u
+}
+
+// SetNillableStatus sets the "status" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableStatus(v *string) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetStatus(*v)
+	}
+	return _u
+}
+
+// SetExpiresAt sets the "expires_at" field.
+func (_u *PromoCodeUpdateOne) SetExpiresAt(v time.Time) *PromoCodeUpdateOne {
+	_u.mutation.SetExpiresAt(v)
+	return _u
+}
+
+// SetNillableExpiresAt sets the "expires_at" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableExpiresAt(v *time.Time) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetExpiresAt(*v)
+	}
+	return _u
+}
+
+// ClearExpiresAt clears the value of the "expires_at" field.
+func (_u *PromoCodeUpdateOne) ClearExpiresAt() *PromoCodeUpdateOne {
+	_u.mutation.ClearExpiresAt()
+	return _u
+}
+
+// SetNotes sets the "notes" field.
+func (_u *PromoCodeUpdateOne) SetNotes(v string) *PromoCodeUpdateOne {
+	_u.mutation.SetNotes(v)
+	return _u
+}
+
+// SetNillableNotes sets the "notes" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableNotes(v *string) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetNotes(*v)
+	}
+	return _u
+}
+
+// ClearNotes clears the value of the "notes" field.
+func (_u *PromoCodeUpdateOne) ClearNotes() *PromoCodeUpdateOne {
+	_u.mutation.ClearNotes()
+	return _u
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (_u *PromoCodeUpdateOne) SetUpdatedAt(v time.Time) *PromoCodeUpdateOne {
+	_u.mutation.SetUpdatedAt(v)
+	return _u
+}
+
+// AddUsageRecordIDs adds the "usage_records" edge to the PromoCodeUsage entity by IDs.
+func (_u *PromoCodeUpdateOne) AddUsageRecordIDs(ids ...int64) *PromoCodeUpdateOne {
+	_u.mutation.AddUsageRecordIDs(ids...)
+	return _u
+}
+
+// AddUsageRecords adds the "usage_records" edges to the PromoCodeUsage entity.
+func (_u *PromoCodeUpdateOne) AddUsageRecords(v ...*PromoCodeUsage) *PromoCodeUpdateOne {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddUsageRecordIDs(ids...)
+}
+
+// Mutation returns the PromoCodeMutation object of the builder.
+func (_u *PromoCodeUpdateOne) Mutation() *PromoCodeMutation {
+	return _u.mutation
+}
+
+// ClearUsageRecords clears all "usage_records" edges to the PromoCodeUsage entity.
+func (_u *PromoCodeUpdateOne) ClearUsageRecords() *PromoCodeUpdateOne {
+	_u.mutation.ClearUsageRecords()
+	return _u
+}
+
+// RemoveUsageRecordIDs removes the "usage_records" edge to PromoCodeUsage entities by IDs.
+func (_u *PromoCodeUpdateOne) RemoveUsageRecordIDs(ids ...int64) *PromoCodeUpdateOne {
+	_u.mutation.RemoveUsageRecordIDs(ids...)
+	return _u
+}
+
+// RemoveUsageRecords removes "usage_records" edges to PromoCodeUsage entities.
+func (_u *PromoCodeUpdateOne) RemoveUsageRecords(v ...*PromoCodeUsage) *PromoCodeUpdateOne {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveUsageRecordIDs(ids...)
+}
+
+// Where appends a list predicates to the PromoCodeUpdate builder.
+func (_u *PromoCodeUpdateOne) Where(ps ...predicate.PromoCode) *PromoCodeUpdateOne {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// Select allows selecting one or more fields (columns) of the returned entity.
+// The default is selecting all fields defined in the entity schema.
+func (_u *PromoCodeUpdateOne) Select(field string, fields ...string) *PromoCodeUpdateOne {
+	_u.fields = append([]string{field}, fields...)
+	return _u
+}
+
+// Save executes the query and returns the updated PromoCode entity.
+func (_u *PromoCodeUpdateOne) Save(ctx context.Context) (*PromoCode, error) {
+	_u.defaults()
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *PromoCodeUpdateOne) SaveX(ctx context.Context) *PromoCode {
+	node, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// Exec executes the query on the entity.
+func (_u *PromoCodeUpdateOne) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *PromoCodeUpdateOne) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// defaults sets the default values of the builder before save.
+func (_u *PromoCodeUpdateOne) defaults() {
+	if _, ok := _u.mutation.UpdatedAt(); !ok {
+		v := promocode.UpdateDefaultUpdatedAt()
+		_u.mutation.SetUpdatedAt(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *PromoCodeUpdateOne) check() error {
+	if v, ok := _u.mutation.Code(); ok {
+		if err := promocode.CodeValidator(v); err != nil {
+			return &ValidationError{Name: "code", err: fmt.Errorf(`ent: validator failed for field "PromoCode.code": %w`, err)}
+		}
+	}
+	if v, ok := _u.mutation.Status(); ok {
+		if err := promocode.StatusValidator(v); err != nil {
+			return &ValidationError{Name: "status", err: fmt.Errorf(`ent: validator failed for field "PromoCode.status": %w`, err)}
+		}
+	}
+	return nil
+}
+
+func (_u *PromoCodeUpdateOne) sqlSave(ctx context.Context) (_node *PromoCode, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(promocode.Table, promocode.Columns, sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64))
+	id, ok := _u.mutation.ID()
+	if !ok {
+		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "PromoCode.id" for update`)}
+	}
+	_spec.Node.ID.Value = id
+	if fields := _u.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, promocode.FieldID)
+		for _, f := range fields {
+			if !promocode.ValidColumn(f) {
+				return nil, &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+			}
+			if f != promocode.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, f)
+			}
+		}
+	}
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.Code(); ok {
+		_spec.SetField(promocode.FieldCode, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.BonusAmount(); ok {
+		_spec.SetField(promocode.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.AddedBonusAmount(); ok {
+		_spec.AddField(promocode.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.MaxUses(); ok {
+		_spec.SetField(promocode.FieldMaxUses, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.AddedMaxUses(); ok {
+		_spec.AddField(promocode.FieldMaxUses, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.UsedCount(); ok {
+		_spec.SetField(promocode.FieldUsedCount, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.AddedUsedCount(); ok {
+		_spec.AddField(promocode.FieldUsedCount, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.Status(); ok {
+		_spec.SetField(promocode.FieldStatus, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.ExpiresAt(); ok {
+		_spec.SetField(promocode.FieldExpiresAt, field.TypeTime, value)
+	}
+	if _u.mutation.ExpiresAtCleared() {
+		_spec.ClearField(promocode.FieldExpiresAt, field.TypeTime)
+	}
+	if value, ok := _u.mutation.Notes(); ok {
+		_spec.SetField(promocode.FieldNotes, field.TypeString, value)
+	}
+	if _u.mutation.NotesCleared() {
+		_spec.ClearField(promocode.FieldNotes, field.TypeString)
+	}
+	if value, ok := _u.mutation.UpdatedAt(); ok {
+		_spec.SetField(promocode.FieldUpdatedAt, field.TypeTime, value)
+	}
+	if _u.mutation.UsageRecordsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedUsageRecordsIDs(); len(nodes) > 0 && !_u.mutation.UsageRecordsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UsageRecordsIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	_node = &PromoCode{config: _u.config}
+	_spec.Assign = _node.assignValues
+	_spec.ScanValues = _node.scanValues
+	if err = sqlgraph.UpdateNode(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{promocode.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}

backend/ent/promocodeusage.go

+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/sql"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/ent/user"
+)
+
+// PromoCodeUsage is the model entity for the PromoCodeUsage schema.
+type PromoCodeUsage struct {
+	config `json:"-"`
+	// ID of the ent.
+	ID int64 `json:"id,omitempty"`
+	// 优惠码ID
+	PromoCodeID int64 `json:"promo_code_id,omitempty"`
+	// 使用用户ID
+	UserID int64 `json:"user_id,omitempty"`
+	// 实际赠送金额
+	BonusAmount float64 `json:"bonus_amount,omitempty"`
+	// 使用时间
+	UsedAt time.Time `json:"used_at,omitempty"`
+	// Edges holds the relations/edges for other nodes in the graph.
+	// The values are being populated by the PromoCodeUsageQuery when eager-loading is set.
+	Edges        PromoCodeUsageEdges `json:"edges"`
+	selectValues sql.SelectValues
+}
+
+// PromoCodeUsageEdges holds the relations/edges for other nodes in the graph.
+type PromoCodeUsageEdges struct {
+	// PromoCode holds the value of the promo_code edge.
+	PromoCode *PromoCode `json:"promo_code,omitempty"`
+	// User holds the value of the user edge.
+	User *User `json:"user,omitempty"`
+	// loadedTypes holds the information for reporting if a
+	// type was loaded (or requested) in eager-loading or not.
+	loadedTypes [2]bool
+}
+
+// PromoCodeOrErr returns the PromoCode value or an error if the edge
+// was not loaded in eager-loading, or loaded but was not found.
+func (e PromoCodeUsageEdges) PromoCodeOrErr() (*PromoCode, error) {
+	if e.PromoCode != nil {
+		return e.PromoCode, nil
+	} else if e.loadedTypes[0] {
+		return nil, &NotFoundError{label: promocode.Label}
+	}
+	return nil, &NotLoadedError{edge: "promo_code"}
+}
+
+// UserOrErr returns the User value or an error if the edge
+// was not loaded in eager-loading, or loaded but was not found.
+func (e PromoCodeUsageEdges) UserOrErr() (*User, error) {
+	if e.User != nil {
+		return e.User, nil
+	} else if e.loadedTypes[1] {
+		return nil, &NotFoundError{label: user.Label}
+	}
+	return nil, &NotLoadedError{edge: "user"}
+}
+
+// scanValues returns the types for scanning values from sql.Rows.
+func (*PromoCodeUsage) scanValues(columns []string) ([]any, error) {
+	values := make([]any, len(columns))
+	for i := range columns {
+		switch columns[i] {
+		case promocodeusage.FieldBonusAmount:
+			values[i] = new(sql.NullFloat64)
+		case promocodeusage.FieldID, promocodeusage.FieldPromoCodeID, promocodeusage.FieldUserID:
+			values[i] = new(sql.NullInt64)
+		case promocodeusage.FieldUsedAt:
+			values[i] = new(sql.NullTime)
+		default:
+			values[i] = new(sql.UnknownType)
+		}
+	}
+	return values, nil
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the PromoCodeUsage fields.
+func (_m *PromoCodeUsage) assignValues(columns []string, values []any) error {
+	if m, n := len(values), len(columns); m < n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	for i := range columns {
+		switch columns[i] {
+		case promocodeusage.FieldID:
+			value, ok := values[i].(*sql.NullInt64)
+			if !ok {
+				return fmt.Errorf("unexpected type %T for field id", value)
+			}
+			_m.ID = int64(value.Int64)
+		case promocodeusage.FieldPromoCodeID:
+			if value, ok := values[i].(*sql.NullInt64); !ok {
+				return fmt.Errorf("unexpected type %T for field promo_code_id", values[i])
+			} else if value.Valid {
+				_m.PromoCodeID = value.Int64
+			}
+		case promocodeusage.FieldUserID:
+			if value, ok := values[i].(*sql.NullInt64); !ok {
+				return fmt.Errorf("unexpected type %T for field user_id", values[i])
+			} else if value.Valid {
+				_m.UserID = value.Int64
+			}
+		case promocodeusage.FieldBonusAmount:
+			if value, ok := values[i].(*sql.NullFloat64); !ok {
+				return fmt.Errorf("unexpected type %T for field bonus_amount", values[i])
+			} else if value.Valid {
+				_m.BonusAmount = value.Float64
+			}
+		case promocodeusage.FieldUsedAt:
+			if value, ok := values[i].(*sql.NullTime); !ok {
+				return fmt.Errorf("unexpected type %T for field used_at", values[i])
+			} else if value.Valid {
+				_m.UsedAt = value.Time
+			}
+		default:
+			_m.selectValues.Set(columns[i], values[i])
+		}
+	}
+	return nil
+}
+
+// Value returns the ent.Value that was dynamically selected and assigned to the PromoCodeUsage.
+// This includes values selected through modifiers, order, etc.
+func (_m *PromoCodeUsage) Value(name string) (ent.Value, error) {
+	return _m.selectValues.Get(name)
+}
+
+// QueryPromoCode queries the "promo_code" edge of the PromoCodeUsage entity.
+func (_m *PromoCodeUsage) QueryPromoCode() *PromoCodeQuery {
+	return NewPromoCodeUsageClient(_m.config).QueryPromoCode(_m)
+}
+
+// QueryUser queries the "user" edge of the PromoCodeUsage entity.
+func (_m *PromoCodeUsage) QueryUser() *UserQuery {
+	return NewPromoCodeUsageClient(_m.config).QueryUser(_m)
+}
+
+// Update returns a builder for updating this PromoCodeUsage.
+// Note that you need to call PromoCodeUsage.Unwrap() before calling this method if this PromoCodeUsage
+// was returned from a transaction, and the transaction was committed or rolled back.
+func (_m *PromoCodeUsage) Update() *PromoCodeUsageUpdateOne {
+	return NewPromoCodeUsageClient(_m.config).UpdateOne(_m)
+}
+
+// Unwrap unwraps the PromoCodeUsage entity that was returned from a transaction after it was closed,
+// so that all future queries will be executed through the driver which created the transaction.
+func (_m *PromoCodeUsage) Unwrap() *PromoCodeUsage {
+	_tx, ok := _m.config.driver.(*txDriver)
+	if !ok {
+		panic("ent: PromoCodeUsage is not a transactional entity")
+	}
+	_m.config.driver = _tx.drv
+	return _m
+}
+
+// String implements the fmt.Stringer.
+func (_m *PromoCodeUsage) String() string {
+	var builder strings.Builder
+	builder.WriteString("PromoCodeUsage(")
+	builder.WriteString(fmt.Sprintf("id=%v, ", _m.ID))
+	builder.WriteString("promo_code_id=")
+	builder.WriteString(fmt.Sprintf("%v", _m.PromoCodeID))
+	builder.WriteString(", ")
+	builder.WriteString("user_id=")
+	builder.WriteString(fmt.Sprintf("%v", _m.UserID))
+	builder.WriteString(", ")
+	builder.WriteString("bonus_amount=")
+	builder.WriteString(fmt.Sprintf("%v", _m.BonusAmount))
+	builder.WriteString(", ")
+	builder.WriteString("used_at=")
+	builder.WriteString(_m.UsedAt.Format(time.ANSIC))
+	builder.WriteByte(')')
+	return builder.String()
+}
+
+// PromoCodeUsages is a parsable slice of PromoCodeUsage.
+type PromoCodeUsages []*PromoCodeUsage

backend/ent/promocodeusage/promocodeusage.go

+// Code generated by ent, DO NOT EDIT.
+
+package promocodeusage
+
+import (
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+const (
+	// Label holds the string label denoting the promocodeusage type in the database.
+	Label = "promo_code_usage"
+	// FieldID holds the string denoting the id field in the database.
+	FieldID = "id"
+	// FieldPromoCodeID holds the string denoting the promo_code_id field in the database.
+	FieldPromoCodeID = "promo_code_id"
+	// FieldUserID holds the string denoting the user_id field in the database.
+	FieldUserID = "user_id"
+	// FieldBonusAmount holds the string denoting the bonus_amount field in the database.
+	FieldBonusAmount = "bonus_amount"
+	// FieldUsedAt holds the string denoting the used_at field in the database.
+	FieldUsedAt = "used_at"
+	// EdgePromoCode holds the string denoting the promo_code edge name in mutations.
+	EdgePromoCode = "promo_code"
+	// EdgeUser holds the string denoting the user edge name in mutations.
+	EdgeUser = "user"
+	// Table holds the table name of the promocodeusage in the database.
+	Table = "promo_code_usages"
+	// PromoCodeTable is the table that holds the promo_code relation/edge.
+	PromoCodeTable = "promo_code_usages"
+	// PromoCodeInverseTable is the table name for the PromoCode entity.
+	// It exists in this package in order to avoid circular dependency with the "promocode" package.
+	PromoCodeInverseTable = "promo_codes"
+	// PromoCodeColumn is the table column denoting the promo_code relation/edge.
+	PromoCodeColumn = "promo_code_id"
+	// UserTable is the table that holds the user relation/edge.
+	UserTable = "promo_code_usages"
+	// UserInverseTable is the table name for the User entity.
+	// It exists in this package in order to avoid circular dependency with the "user" package.
+	UserInverseTable = "users"
+	// UserColumn is the table column denoting the user relation/edge.
+	UserColumn = "user_id"
+)
+
+// Columns holds all SQL columns for promocodeusage fields.
+var Columns = []string{
+	FieldID,
+	FieldPromoCodeID,
+	FieldUserID,
+	FieldBonusAmount,
+	FieldUsedAt,
+}
+
+// ValidColumn reports if the column name is valid (part of the table columns).
+func ValidColumn(column string) bool {
+	for i := range Columns {
+		if column == Columns[i] {
+			return true
+		}
+	}
+	return false
+}
+
+var (
+	// DefaultUsedAt holds the default value on creation for the "used_at" field.
+	DefaultUsedAt func() time.Time
+)
+
+// OrderOption defines the ordering options for the PromoCodeUsage queries.
+type OrderOption func(*sql.Selector)
+
+// ByID orders the results by the id field.
+func ByID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldID, opts...).ToFunc()
+}
+
+// ByPromoCodeID orders the results by the promo_code_id field.
+func ByPromoCodeID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldPromoCodeID, opts...).ToFunc()
+}
+
+// ByUserID orders the results by the user_id field.
+func ByUserID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldUserID, opts...).ToFunc()
+}
+
+// ByBonusAmount orders the results by the bonus_amount field.
+func ByBonusAmount(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldBonusAmount, opts...).ToFunc()
+}
+
+// ByUsedAt orders the results by the used_at field.
+func ByUsedAt(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldUsedAt, opts...).ToFunc()
+}
+
+// ByPromoCodeField orders the results by promo_code field.
+func ByPromoCodeField(field string, opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newPromoCodeStep(), sql.OrderByField(field, opts...))
+	}
+}
+
+// ByUserField orders the results by user field.
+func ByUserField(field string, opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newUserStep(), sql.OrderByField(field, opts...))
+	}
+}
+func newPromoCodeStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(PromoCodeInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2O, true, PromoCodeTable, PromoCodeColumn),
+	)
+}
+func newUserStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(UserInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2O, true, UserTable, UserColumn),
+	)
+}

backend/ent/promocodeusage/where.go

+// Code generated by ent, DO NOT EDIT.
+
+package promocodeusage
+
+import (
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+)
+
+// ID filters vertices based on their ID field.
+func ID(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLTE(FieldID, id))
+}
+
+// PromoCodeID applies equality check predicate on the "promo_code_id" field. It's identical to PromoCodeIDEQ.
+func PromoCodeID(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldPromoCodeID, v))
+}
+
+// UserID applies equality check predicate on the "user_id" field. It's identical to UserIDEQ.
+func UserID(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldUserID, v))
+}
+
+// BonusAmount applies equality check predicate on the "bonus_amount" field. It's identical to BonusAmountEQ.
+func BonusAmount(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldBonusAmount, v))
+}
+
+// UsedAt applies equality check predicate on the "used_at" field. It's identical to UsedAtEQ.
+func UsedAt(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldUsedAt, v))
+}
+
+// PromoCodeIDEQ applies the EQ predicate on the "promo_code_id" field.
+func PromoCodeIDEQ(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldPromoCodeID, v))
+}
+
+// PromoCodeIDNEQ applies the NEQ predicate on the "promo_code_id" field.
+func PromoCodeIDNEQ(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldPromoCodeID, v))
+}
+
+// PromoCodeIDIn applies the In predicate on the "promo_code_id" field.
+func PromoCodeIDIn(vs ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldPromoCodeID, vs...))
+}
+
+// PromoCodeIDNotIn applies the NotIn predicate on the "promo_code_id" field.
+func PromoCodeIDNotIn(vs ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldPromoCodeID, vs...))
+}
+
+// UserIDEQ applies the EQ predicate on the "user_id" field.
+func UserIDEQ(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldUserID, v))
+}
+
+// UserIDNEQ applies the NEQ predicate on the "user_id" field.
+func UserIDNEQ(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldUserID, v))
+}
+
+// UserIDIn applies the In predicate on the "user_id" field.
+func UserIDIn(vs ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldUserID, vs...))
+}
+
+// UserIDNotIn applies the NotIn predicate on the "user_id" field.
+func UserIDNotIn(vs ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldUserID, vs...))
+}
+
+// BonusAmountEQ applies the EQ predicate on the "bonus_amount" field.
+func BonusAmountEQ(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldBonusAmount, v))
+}
+
+// BonusAmountNEQ applies the NEQ predicate on the "bonus_amount" field.
+func BonusAmountNEQ(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldBonusAmount, v))
+}
+
+// BonusAmountIn applies the In predicate on the "bonus_amount" field.
+func BonusAmountIn(vs ...float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldBonusAmount, vs...))
+}
+
+// BonusAmountNotIn applies the NotIn predicate on the "bonus_amount" field.
+func BonusAmountNotIn(vs ...float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldBonusAmount, vs...))
+}
+
+// BonusAmountGT applies the GT predicate on the "bonus_amount" field.
+func BonusAmountGT(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGT(FieldBonusAmount, v))
+}
+
+// BonusAmountGTE applies the GTE predicate on the "bonus_amount" field.
+func BonusAmountGTE(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGTE(FieldBonusAmount, v))
+}
+
+// BonusAmountLT applies the LT predicate on the "bonus_amount" field.
+func BonusAmountLT(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLT(FieldBonusAmount, v))
+}
+
+// BonusAmountLTE applies the LTE predicate on the "bonus_amount" field.
+func BonusAmountLTE(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLTE(FieldBonusAmount, v))
+}
+
+// UsedAtEQ applies the EQ predicate on the "used_at" field.
+func UsedAtEQ(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldUsedAt, v))
+}
+
+// UsedAtNEQ applies the NEQ predicate on the "used_at" field.
+func UsedAtNEQ(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldUsedAt, v))
+}
+
+// UsedAtIn applies the In predicate on the "used_at" field.
+func UsedAtIn(vs ...time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldUsedAt, vs...))
+}
+
+// UsedAtNotIn applies the NotIn predicate on the "used_at" field.
+func UsedAtNotIn(vs ...time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldUsedAt, vs...))
+}
+
+// UsedAtGT applies the GT predicate on the "used_at" field.
+func UsedAtGT(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGT(FieldUsedAt, v))
+}
+
+// UsedAtGTE applies the GTE predicate on the "used_at" field.
+func UsedAtGTE(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGTE(FieldUsedAt, v))
+}
+
+// UsedAtLT applies the LT predicate on the "used_at" field.
+func UsedAtLT(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLT(FieldUsedAt, v))
+}
+
+// UsedAtLTE applies the LTE predicate on the "used_at" field.
+func UsedAtLTE(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLTE(FieldUsedAt, v))
+}
+
+// HasPromoCode applies the HasEdge predicate on the "promo_code" edge.
+func HasPromoCode() predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, PromoCodeTable, PromoCodeColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasPromoCodeWith applies the HasEdge predicate on the "promo_code" edge with a given conditions (other predicates).
+func HasPromoCodeWith(preds ...predicate.PromoCode) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(func(s *sql.Selector) {
+		step := newPromoCodeStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// HasUser applies the HasEdge predicate on the "user" edge.
+func HasUser() predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, UserTable, UserColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasUserWith applies the HasEdge predicate on the "user" edge with a given conditions (other predicates).
+func HasUserWith(preds ...predicate.User) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(func(s *sql.Selector) {
+		step := newUserStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// And groups predicates with the AND operator between them.
+func And(predicates ...predicate.PromoCodeUsage) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.PromoCodeUsage) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.PromoCodeUsage) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.NotPredicates(p))
+}

backend/ent/promocodeusage_create.go

+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/ent/user"
+)
+
+// PromoCodeUsageCreate is the builder for creating a PromoCodeUsage entity.
+type PromoCodeUsageCreate struct {
+	config
+	mutation *PromoCodeUsageMutation
+	hooks    []Hook
+	conflict []sql.ConflictOption
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (_c *PromoCodeUsageCreate) SetPromoCodeID(v int64) *PromoCodeUsageCreate {
+	_c.mutation.SetPromoCodeID(v)
+	return _c
+}
+
+// SetUserID sets the "user_id" field.
+func (_c *PromoCodeUsageCreate) SetUserID(v int64) *PromoCodeUsageCreate {
+	_c.mutation.SetUserID(v)
+	return _c
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_c *PromoCodeUsageCreate) SetBonusAmount(v float64) *PromoCodeUsageCreate {
+	_c.mutation.SetBonusAmount(v)
+	return _c
+}
+
+// SetUsedAt sets the "used_at" field.
+func (_c *PromoCodeUsageCreate) SetUsedAt(v time.Time) *PromoCodeUsageCreate {
+	_c.mutation.SetUsedAt(v)
+	return _c
+}
+
+// SetNillableUsedAt sets the "used_at" field if the given value is not nil.
+func (_c *PromoCodeUsageCreate) SetNillableUsedAt(v *time.Time) *PromoCodeUsageCreate {
+	if v != nil {
+		_c.SetUsedAt(*v)
+	}
+	return _c
+}
+
+// SetPromoCode sets the "promo_code" edge to the PromoCode entity.
+func (_c *PromoCodeUsageCreate) SetPromoCode(v *PromoCode) *PromoCodeUsageCreate {
+	return _c.SetPromoCodeID(v.ID)
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_c *PromoCodeUsageCreate) SetUser(v *User) *PromoCodeUsageCreate {
+	return _c.SetUserID(v.ID)
+}
+
+// Mutation returns the PromoCodeUsageMutation object of the builder.
+func (_c *PromoCodeUsageCreate) Mutation() *PromoCodeUsageMutation {
+	return _c.mutation
+}
+
+// Save creates the PromoCodeUsage in the database.
+func (_c *PromoCodeUsageCreate) Save(ctx context.Context) (*PromoCodeUsage, error) {
+	_c.defaults()
+	return withHooks(ctx, _c.sqlSave, _c.mutation, _c.hooks)
+}
+
+// SaveX calls Save and panics if Save returns an error.
+func (_c *PromoCodeUsageCreate) SaveX(ctx context.Context) *PromoCodeUsage {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *PromoCodeUsageCreate) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *PromoCodeUsageCreate) ExecX(ctx context.Context) {
+	if err := _c.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// defaults sets the default values of the builder before save.
+func (_c *PromoCodeUsageCreate) defaults() {
+	if _, ok := _c.mutation.UsedAt(); !ok {
+		v := promocodeusage.DefaultUsedAt()
+		_c.mutation.SetUsedAt(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_c *PromoCodeUsageCreate) check() error {
+	if _, ok := _c.mutation.PromoCodeID(); !ok {
+		return &ValidationError{Name: "promo_code_id", err: errors.New(`ent: missing required field "PromoCodeUsage.promo_code_id"`)}
+	}
+	if _, ok := _c.mutation.UserID(); !ok {
+		return &ValidationError{Name: "user_id", err: errors.New(`ent: missing required field "PromoCodeUsage.user_id"`)}
+	}
+	if _, ok := _c.mutation.BonusAmount(); !ok {
+		return &ValidationError{Name: "bonus_amount", err: errors.New(`ent: missing required field "PromoCodeUsage.bonus_amount"`)}
+	}
+	if _, ok := _c.mutation.UsedAt(); !ok {
+		return &ValidationError{Name: "used_at", err: errors.New(`ent: missing required field "PromoCodeUsage.used_at"`)}
+	}
+	if len(_c.mutation.PromoCodeIDs()) == 0 {
+		return &ValidationError{Name: "promo_code", err: errors.New(`ent: missing required edge "PromoCodeUsage.promo_code"`)}
+	}
+	if len(_c.mutation.UserIDs()) == 0 {
+		return &ValidationError{Name: "user", err: errors.New(`ent: missing required edge "PromoCodeUsage.user"`)}
+	}
+	return nil
+}
+
+func (_c *PromoCodeUsageCreate) sqlSave(ctx context.Context) (*PromoCodeUsage, error) {
+	if err := _c.check(); err != nil {
+		return nil, err
+	}
+	_node, _spec := _c.createSpec()
+	if err := sqlgraph.CreateNode(ctx, _c.driver, _spec); err != nil {
+		if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	id := _spec.ID.Value.(int64)
+	_node.ID = int64(id)
+	_c.mutation.id = &_node.ID
+	_c.mutation.done = true
+	return _node, nil
+}
+
+func (_c *PromoCodeUsageCreate) createSpec() (*PromoCodeUsage, *sqlgraph.CreateSpec) {
+	var (
+		_node = &PromoCodeUsage{config: _c.config}
+		_spec = sqlgraph.NewCreateSpec(promocodeusage.Table, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	)
+	_spec.OnConflict = _c.conflict
+	if value, ok := _c.mutation.BonusAmount(); ok {
+		_spec.SetField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+		_node.BonusAmount = value
+	}
+	if value, ok := _c.mutation.UsedAt(); ok {
+		_spec.SetField(promocodeusage.FieldUsedAt, field.TypeTime, value)
+		_node.UsedAt = value
+	}
+	if nodes := _c.mutation.PromoCodeIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_node.PromoCodeID = nodes[0]
+		_spec.Edges = append(_spec.Edges, edge)
+	}
+	if nodes := _c.mutation.UserIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_node.UserID = nodes[0]
+		_spec.Edges = append(_spec.Edges, edge)
+	}
+	return _node, _spec
+}
+
+// OnConflict allows configuring the `ON CONFLICT` / `ON DUPLICATE KEY` clause
+// of the `INSERT` statement. For example:
+//
+//	client.PromoCodeUsage.Create().
+//		SetPromoCodeID(v).
+//		OnConflict(
+//			// Update the row with the new values
+//			// the was proposed for insertion.
+//			sql.ResolveWithNewValues(),
+//		).
+//		// Override some of the fields with custom
+//		// update values.
+//		Update(func(u *ent.PromoCodeUsageUpsert) {
+//			SetPromoCodeID(v+v).
+//		}).
+//		Exec(ctx)
+func (_c *PromoCodeUsageCreate) OnConflict(opts ...sql.ConflictOption) *PromoCodeUsageUpsertOne {
+	_c.conflict = opts
+	return &PromoCodeUsageUpsertOne{
+		create: _c,
+	}
+}
+
+// OnConflictColumns calls `OnConflict` and configures the columns
+// as conflict target. Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(sql.ConflictColumns(columns...)).
+//		Exec(ctx)
+func (_c *PromoCodeUsageCreate) OnConflictColumns(columns ...string) *PromoCodeUsageUpsertOne {
+	_c.conflict = append(_c.conflict, sql.ConflictColumns(columns...))
+	return &PromoCodeUsageUpsertOne{
+		create: _c,
+	}
+}
+
+type (
+	// PromoCodeUsageUpsertOne is the builder for "upsert"-ing
+	//  one PromoCodeUsage node.
+	PromoCodeUsageUpsertOne struct {
+		create *PromoCodeUsageCreate
+	}
+
+	// PromoCodeUsageUpsert is the "OnConflict" setter.
+	PromoCodeUsageUpsert struct {
+		*sql.UpdateSet
+	}
+)
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (u *PromoCodeUsageUpsert) SetPromoCodeID(v int64) *PromoCodeUsageUpsert {
+	u.Set(promocodeusage.FieldPromoCodeID, v)
+	return u
+}
+
+// UpdatePromoCodeID sets the "promo_code_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsert) UpdatePromoCodeID() *PromoCodeUsageUpsert {
+	u.SetExcluded(promocodeusage.FieldPromoCodeID)
+	return u
+}
+
+// SetUserID sets the "user_id" field.
+func (u *PromoCodeUsageUpsert) SetUserID(v int64) *PromoCodeUsageUpsert {
+	u.Set(promocodeusage.FieldUserID, v)
+	return u
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsert) UpdateUserID() *PromoCodeUsageUpsert {
+	u.SetExcluded(promocodeusage.FieldUserID)
+	return u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (u *PromoCodeUsageUpsert) SetBonusAmount(v float64) *PromoCodeUsageUpsert {
+	u.Set(promocodeusage.FieldBonusAmount, v)
+	return u
+}
+
+// UpdateBonusAmount sets the "bonus_amount" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsert) UpdateBonusAmount() *PromoCodeUsageUpsert {
+	u.SetExcluded(promocodeusage.FieldBonusAmount)
+	return u
+}
+
+// AddBonusAmount adds v to the "bonus_amount" field.
+func (u *PromoCodeUsageUpsert) AddBonusAmount(v float64) *PromoCodeUsageUpsert {
+	u.Add(promocodeusage.FieldBonusAmount, v)
+	return u
+}
+
+// SetUsedAt sets the "used_at" field.
+func (u *PromoCodeUsageUpsert) SetUsedAt(v time.Time) *PromoCodeUsageUpsert {
+	u.Set(promocodeusage.FieldUsedAt, v)
+	return u
+}
+
+// UpdateUsedAt sets the "used_at" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsert) UpdateUsedAt() *PromoCodeUsageUpsert {
+	u.SetExcluded(promocodeusage.FieldUsedAt)
+	return u
+}
+
+// UpdateNewValues updates the mutable fields using the new values that were set on create.
+// Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(
+//			sql.ResolveWithNewValues(),
+//		).
+//		Exec(ctx)
+func (u *PromoCodeUsageUpsertOne) UpdateNewValues() *PromoCodeUsageUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithNewValues())
+	return u
+}
+
+// Ignore sets each column to itself in case of conflict.
+// Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//	    OnConflict(sql.ResolveWithIgnore()).
+//	    Exec(ctx)
+func (u *PromoCodeUsageUpsertOne) Ignore() *PromoCodeUsageUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithIgnore())
+	return u
+}
+
+// DoNothing configures the conflict_action to `DO NOTHING`.
+// Supported only by SQLite and PostgreSQL.
+func (u *PromoCodeUsageUpsertOne) DoNothing() *PromoCodeUsageUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.DoNothing())
+	return u
+}
+
+// Update allows overriding fields `UPDATE` values. See the PromoCodeUsageCreate.OnConflict
+// documentation for more info.
+func (u *PromoCodeUsageUpsertOne) Update(set func(*PromoCodeUsageUpsert)) *PromoCodeUsageUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWith(func(update *sql.UpdateSet) {
+		set(&PromoCodeUsageUpsert{UpdateSet: update})
+	}))
+	return u
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (u *PromoCodeUsageUpsertOne) SetPromoCodeID(v int64) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetPromoCodeID(v)
+	})
+}
+
+// UpdatePromoCodeID sets the "promo_code_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertOne) UpdatePromoCodeID() *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdatePromoCodeID()
+	})
+}
+
+// SetUserID sets the "user_id" field.
+func (u *PromoCodeUsageUpsertOne) SetUserID(v int64) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetUserID(v)
+	})
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertOne) UpdateUserID() *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateUserID()
+	})
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (u *PromoCodeUsageUpsertOne) SetBonusAmount(v float64) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetBonusAmount(v)
+	})
+}
+
+// AddBonusAmount adds v to the "bonus_amount" field.
+func (u *PromoCodeUsageUpsertOne) AddBonusAmount(v float64) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.AddBonusAmount(v)
+	})
+}
+
+// UpdateBonusAmount sets the "bonus_amount" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertOne) UpdateBonusAmount() *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateBonusAmount()
+	})
+}
+
+// SetUsedAt sets the "used_at" field.
+func (u *PromoCodeUsageUpsertOne) SetUsedAt(v time.Time) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetUsedAt(v)
+	})
+}
+
+// UpdateUsedAt sets the "used_at" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertOne) UpdateUsedAt() *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateUsedAt()
+	})
+}
+
+// Exec executes the query.
+func (u *PromoCodeUsageUpsertOne) Exec(ctx context.Context) error {
+	if len(u.create.conflict) == 0 {
+		return errors.New("ent: missing options for PromoCodeUsageCreate.OnConflict")
+	}
+	return u.create.Exec(ctx)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (u *PromoCodeUsageUpsertOne) ExecX(ctx context.Context) {
+	if err := u.create.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// Exec executes the UPSERT query and returns the inserted/updated ID.
+func (u *PromoCodeUsageUpsertOne) ID(ctx context.Context) (id int64, err error) {
+	node, err := u.create.Save(ctx)
+	if err != nil {
+		return id, err
+	}
+	return node.ID, nil
+}
+
+// IDX is like ID, but panics if an error occurs.
+func (u *PromoCodeUsageUpsertOne) IDX(ctx context.Context) int64 {
+	id, err := u.ID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// PromoCodeUsageCreateBulk is the builder for creating many PromoCodeUsage entities in bulk.
+type PromoCodeUsageCreateBulk struct {
+	config
+	err      error
+	builders []*PromoCodeUsageCreate
+	conflict []sql.ConflictOption
+}
+
+// Save creates the PromoCodeUsage entities in the database.
+func (_c *PromoCodeUsageCreateBulk) Save(ctx context.Context) ([]*PromoCodeUsage, error) {
+	if _c.err != nil {
+		return nil, _c.err
+	}
+	specs := make([]*sqlgraph.CreateSpec, len(_c.builders))
+	nodes := make([]*PromoCodeUsage, len(_c.builders))
+	mutators := make([]Mutator, len(_c.builders))
+	for i := range _c.builders {
+		func(i int, root context.Context) {
+			builder := _c.builders[i]
+			builder.defaults()
+			var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
+				mutation, ok := m.(*PromoCodeUsageMutation)
+				if !ok {
+					return nil, fmt.Errorf("unexpected mutation type %T", m)
+				}
+				if err := builder.check(); err != nil {
+					return nil, err
+				}
+				builder.mutation = mutation
+				var err error
+				nodes[i], specs[i] = builder.createSpec()
+				if i < len(mutators)-1 {
+					_, err = mutators[i+1].Mutate(root, _c.builders[i+1].mutation)
+				} else {
+					spec := &sqlgraph.BatchCreateSpec{Nodes: specs}
+					spec.OnConflict = _c.conflict
+					// Invoke the actual operation on the latest mutation in the chain.
+					if err = sqlgraph.BatchCreate(ctx, _c.driver, spec); err != nil {
+						if sqlgraph.IsConstraintError(err) {
+							err = &ConstraintError{msg: err.Error(), wrap: err}
+						}
+					}
+				}
+				if err != nil {
+					return nil, err
+				}
+				mutation.id = &nodes[i].ID
+				if specs[i].ID.Value != nil {
+					id := specs[i].ID.Value.(int64)
+					nodes[i].ID = int64(id)
+				}
+				mutation.done = true
+				return nodes[i], nil
+			})
+			for i := len(builder.hooks) - 1; i >= 0; i-- {
+				mut = builder.hooks[i](mut)
+			}
+			mutators[i] = mut
+		}(i, ctx)
+	}
+	if len(mutators) > 0 {
+		if _, err := mutators[0].Mutate(ctx, _c.builders[0].mutation); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_c *PromoCodeUsageCreateBulk) SaveX(ctx context.Context) []*PromoCodeUsage {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *PromoCodeUsageCreateBulk) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *PromoCodeUsageCreateBulk) ExecX(ctx context.Context) {
+	if err := _c.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// OnConflict allows configuring the `ON CONFLICT` / `ON DUPLICATE KEY` clause
+// of the `INSERT` statement. For example:
+//
+//	client.PromoCodeUsage.CreateBulk(builders...).
+//		OnConflict(
+//			// Update the row with the new values
+//			// the was proposed for insertion.
+//			sql.ResolveWithNewValues(),
+//		).
+//		// Override some of the fields with custom
+//		// update values.
+//		Update(func(u *ent.PromoCodeUsageUpsert) {
+//			SetPromoCodeID(v+v).
+//		}).
+//		Exec(ctx)
+func (_c *PromoCodeUsageCreateBulk) OnConflict(opts ...sql.ConflictOption) *PromoCodeUsageUpsertBulk {
+	_c.conflict = opts
+	return &PromoCodeUsageUpsertBulk{
+		create: _c,
+	}
+}
+
+// OnConflictColumns calls `OnConflict` and configures the columns
+// as conflict target. Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(sql.ConflictColumns(columns...)).
+//		Exec(ctx)
+func (_c *PromoCodeUsageCreateBulk) OnConflictColumns(columns ...string) *PromoCodeUsageUpsertBulk {
+	_c.conflict = append(_c.conflict, sql.ConflictColumns(columns...))
+	return &PromoCodeUsageUpsertBulk{
+		create: _c,
+	}
+}
+
+// PromoCodeUsageUpsertBulk is the builder for "upsert"-ing
+// a bulk of PromoCodeUsage nodes.
+type PromoCodeUsageUpsertBulk struct {
+	create *PromoCodeUsageCreateBulk
+}
+
+// UpdateNewValues updates the mutable fields using the new values that
+// were set on create. Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(
+//			sql.ResolveWithNewValues(),
+//		).
+//		Exec(ctx)
+func (u *PromoCodeUsageUpsertBulk) UpdateNewValues() *PromoCodeUsageUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithNewValues())
+	return u
+}
+
+// Ignore sets each column to itself in case of conflict.
+// Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(sql.ResolveWithIgnore()).
+//		Exec(ctx)
+func (u *PromoCodeUsageUpsertBulk) Ignore() *PromoCodeUsageUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithIgnore())
+	return u
+}
+
+// DoNothing configures the conflict_action to `DO NOTHING`.
+// Supported only by SQLite and PostgreSQL.
+func (u *PromoCodeUsageUpsertBulk) DoNothing() *PromoCodeUsageUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.DoNothing())
+	return u
+}
+
+// Update allows overriding fields `UPDATE` values. See the PromoCodeUsageCreateBulk.OnConflict
+// documentation for more info.
+func (u *PromoCodeUsageUpsertBulk) Update(set func(*PromoCodeUsageUpsert)) *PromoCodeUsageUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWith(func(update *sql.UpdateSet) {
+		set(&PromoCodeUsageUpsert{UpdateSet: update})
+	}))
+	return u
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (u *PromoCodeUsageUpsertBulk) SetPromoCodeID(v int64) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetPromoCodeID(v)
+	})
+}
+
+// UpdatePromoCodeID sets the "promo_code_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertBulk) UpdatePromoCodeID() *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdatePromoCodeID()
+	})
+}
+
+// SetUserID sets the "user_id" field.
+func (u *PromoCodeUsageUpsertBulk) SetUserID(v int64) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetUserID(v)
+	})
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertBulk) UpdateUserID() *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateUserID()
+	})
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (u *PromoCodeUsageUpsertBulk) SetBonusAmount(v float64) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetBonusAmount(v)
+	})
+}
+
+// AddBonusAmount adds v to the "bonus_amount" field.
+func (u *PromoCodeUsageUpsertBulk) AddBonusAmount(v float64) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.AddBonusAmount(v)
+	})
+}
+
+// UpdateBonusAmount sets the "bonus_amount" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertBulk) UpdateBonusAmount() *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateBonusAmount()
+	})
+}
+
+// SetUsedAt sets the "used_at" field.
+func (u *PromoCodeUsageUpsertBulk) SetUsedAt(v time.Time) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetUsedAt(v)
+	})
+}
+
+// UpdateUsedAt sets the "used_at" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertBulk) UpdateUsedAt() *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateUsedAt()
+	})
+}
+
+// Exec executes the query.
+func (u *PromoCodeUsageUpsertBulk) Exec(ctx context.Context) error {
+	if u.create.err != nil {
+		return u.create.err
+	}
+	for i, b := range u.create.builders {
+		if len(b.conflict) != 0 {
+			return fmt.Errorf("ent: OnConflict was set for builder %d. Set it on the PromoCodeUsageCreateBulk instead", i)
+		}
+	}
+	if len(u.create.conflict) == 0 {
+		return errors.New("ent: missing options for PromoCodeUsageCreateBulk.OnConflict")
+	}
+	return u.create.Exec(ctx)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (u *PromoCodeUsageUpsertBulk) ExecX(ctx context.Context) {
+	if err := u.create.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

backend/ent/promocodeusage_delete.go

+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+)
+
+// PromoCodeUsageDelete is the builder for deleting a PromoCodeUsage entity.
+type PromoCodeUsageDelete struct {
+	config
+	hooks    []Hook
+	mutation *PromoCodeUsageMutation
+}
+
+// Where appends a list predicates to the PromoCodeUsageDelete builder.
+func (_d *PromoCodeUsageDelete) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageDelete {
+	_d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query and returns how many vertices were deleted.
+func (_d *PromoCodeUsageDelete) Exec(ctx context.Context) (int, error) {
+	return withHooks(ctx, _d.sqlExec, _d.mutation, _d.hooks)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *PromoCodeUsageDelete) ExecX(ctx context.Context) int {
+	n, err := _d.Exec(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+func (_d *PromoCodeUsageDelete) sqlExec(ctx context.Context) (int, error) {
+	_spec := sqlgraph.NewDeleteSpec(promocodeusage.Table, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	if ps := _d.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	affected, err := sqlgraph.DeleteNodes(ctx, _d.driver, _spec)
+	if err != nil && sqlgraph.IsConstraintError(err) {
+		err = &ConstraintError{msg: err.Error(), wrap: err}
+	}
+	_d.mutation.done = true
+	return affected, err
+}
+
+// PromoCodeUsageDeleteOne is the builder for deleting a single PromoCodeUsage entity.
+type PromoCodeUsageDeleteOne struct {
+	_d *PromoCodeUsageDelete
+}
+
+// Where appends a list predicates to the PromoCodeUsageDelete builder.
+func (_d *PromoCodeUsageDeleteOne) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageDeleteOne {
+	_d._d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query.
+func (_d *PromoCodeUsageDeleteOne) Exec(ctx context.Context) error {
+	n, err := _d._d.Exec(ctx)
+	switch {
+	case err != nil:
+		return err
+	case n == 0:
+		return &NotFoundError{promocodeusage.Label}
+	default:
+		return nil
+	}
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *PromoCodeUsageDeleteOne) ExecX(ctx context.Context) {
+	if err := _d.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

backend/ent/promocodeusage_query.go

+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"fmt"
+	"math"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/ent/user"
+)
+
+// PromoCodeUsageQuery is the builder for querying PromoCodeUsage entities.
+type PromoCodeUsageQuery struct {
+	config
+	ctx           *QueryContext
+	order         []promocodeusage.OrderOption
+	inters        []Interceptor
+	predicates    []predicate.PromoCodeUsage
+	withPromoCode *PromoCodeQuery
+	withUser      *UserQuery
+	modifiers     []func(*sql.Selector)
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the PromoCodeUsageQuery builder.
+func (_q *PromoCodeUsageQuery) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageQuery {
+	_q.predicates = append(_q.predicates, ps...)
+	return _q
+}
+
+// Limit the number of records to be returned by this query.
+func (_q *PromoCodeUsageQuery) Limit(limit int) *PromoCodeUsageQuery {
+	_q.ctx.Limit = &limit
+	return _q
+}
+
+// Offset to start from.
+func (_q *PromoCodeUsageQuery) Offset(offset int) *PromoCodeUsageQuery {
+	_q.ctx.Offset = &offset
+	return _q
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (_q *PromoCodeUsageQuery) Unique(unique bool) *PromoCodeUsageQuery {
+	_q.ctx.Unique = &unique
+	return _q
+}
+
+// Order specifies how the records should be ordered.
+func (_q *PromoCodeUsageQuery) Order(o ...promocodeusage.OrderOption) *PromoCodeUsageQuery {
+	_q.order = append(_q.order, o...)
+	return _q
+}
+
+// QueryPromoCode chains the current query on the "promo_code" edge.
+func (_q *PromoCodeUsageQuery) QueryPromoCode() *PromoCodeQuery {
+	query := (&PromoCodeClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocodeusage.Table, promocodeusage.FieldID, selector),
+			sqlgraph.To(promocode.Table, promocode.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, promocodeusage.PromoCodeTable, promocodeusage.PromoCodeColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// QueryUser chains the current query on the "user" edge.
+func (_q *PromoCodeUsageQuery) QueryUser() *UserQuery {
+	query := (&UserClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocodeusage.Table, promocodeusage.FieldID, selector),
+			sqlgraph.To(user.Table, user.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, promocodeusage.UserTable, promocodeusage.UserColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first PromoCodeUsage entity from the query.
+// Returns a *NotFoundError when no PromoCodeUsage was found.
+func (_q *PromoCodeUsageQuery) First(ctx context.Context) (*PromoCodeUsage, error) {
+	nodes, err := _q.Limit(1).All(setContextOp(ctx, _q.ctx, ent.OpQueryFirst))
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{promocodeusage.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) FirstX(ctx context.Context) *PromoCodeUsage {
+	node, err := _q.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first PromoCodeUsage ID from the query.
+// Returns a *NotFoundError when no PromoCodeUsage ID was found.
+func (_q *PromoCodeUsageQuery) FirstID(ctx context.Context) (id int64, err error) {
+	var ids []int64
+	if ids, err = _q.Limit(1).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryFirstID)); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{promocodeusage.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) FirstIDX(ctx context.Context) int64 {
+	id, err := _q.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single PromoCodeUsage entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one PromoCodeUsage entity is found.
+// Returns a *NotFoundError when no PromoCodeUsage entities are found.
+func (_q *PromoCodeUsageQuery) Only(ctx context.Context) (*PromoCodeUsage, error) {
+	nodes, err := _q.Limit(2).All(setContextOp(ctx, _q.ctx, ent.OpQueryOnly))
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{promocodeusage.Label}
+	default:
+		return nil, &NotSingularError{promocodeusage.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) OnlyX(ctx context.Context) *PromoCodeUsage {
+	node, err := _q.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only PromoCodeUsage ID in the query.
+// Returns a *NotSingularError when more than one PromoCodeUsage ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (_q *PromoCodeUsageQuery) OnlyID(ctx context.Context) (id int64, err error) {
+	var ids []int64
+	if ids, err = _q.Limit(2).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryOnlyID)); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{promocodeusage.Label}
+	default:
+		err = &NotSingularError{promocodeusage.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) OnlyIDX(ctx context.Context) int64 {
+	id, err := _q.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of PromoCodeUsages.
+func (_q *PromoCodeUsageQuery) All(ctx context.Context) ([]*PromoCodeUsage, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryAll)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	qr := querierAll[[]*PromoCodeUsage, *PromoCodeUsageQuery]()
+	return withInterceptors[[]*PromoCodeUsage](ctx, _q, qr, _q.inters)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) AllX(ctx context.Context) []*PromoCodeUsage {
+	nodes, err := _q.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of PromoCodeUsage IDs.
+func (_q *PromoCodeUsageQuery) IDs(ctx context.Context) (ids []int64, err error) {
+	if _q.ctx.Unique == nil && _q.path != nil {
+		_q.Unique(true)
+	}
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryIDs)
+	if err = _q.Select(promocodeusage.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) IDsX(ctx context.Context) []int64 {
+	ids, err := _q.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (_q *PromoCodeUsageQuery) Count(ctx context.Context) (int, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryCount)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return withInterceptors[int](ctx, _q, querierCount[*PromoCodeUsageQuery](), _q.inters)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) CountX(ctx context.Context) int {
+	count, err := _q.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (_q *PromoCodeUsageQuery) Exist(ctx context.Context) (bool, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryExist)
+	switch _, err := _q.FirstID(ctx); {
+	case IsNotFound(err):
+		return false, nil
+	case err != nil:
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	default:
+		return true, nil
+	}
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) ExistX(ctx context.Context) bool {
+	exist, err := _q.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the PromoCodeUsageQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (_q *PromoCodeUsageQuery) Clone() *PromoCodeUsageQuery {
+	if _q == nil {
+		return nil
+	}
+	return &PromoCodeUsageQuery{
+		config:        _q.config,
+		ctx:           _q.ctx.Clone(),
+		order:         append([]promocodeusage.OrderOption{}, _q.order...),
+		inters:        append([]Interceptor{}, _q.inters...),
+		predicates:    append([]predicate.PromoCodeUsage{}, _q.predicates...),
+		withPromoCode: _q.withPromoCode.Clone(),
+		withUser:      _q.withUser.Clone(),
+		// clone intermediate query.
+		sql:  _q.sql.Clone(),
+		path: _q.path,
+	}
+}
+
+// WithPromoCode tells the query-builder to eager-load the nodes that are connected to
+// the "promo_code" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *PromoCodeUsageQuery) WithPromoCode(opts ...func(*PromoCodeQuery)) *PromoCodeUsageQuery {
+	query := (&PromoCodeClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withPromoCode = query
+	return _q
+}
+
+// WithUser tells the query-builder to eager-load the nodes that are connected to
+// the "user" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *PromoCodeUsageQuery) WithUser(opts ...func(*UserQuery)) *PromoCodeUsageQuery {
+	query := (&UserClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withUser = query
+	return _q
+}
+
+// GroupBy is used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		PromoCodeID int64 `json:"promo_code_id,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.PromoCodeUsage.Query().
+//		GroupBy(promocodeusage.FieldPromoCodeID).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (_q *PromoCodeUsageQuery) GroupBy(field string, fields ...string) *PromoCodeUsageGroupBy {
+	_q.ctx.Fields = append([]string{field}, fields...)
+	grbuild := &PromoCodeUsageGroupBy{build: _q}
+	grbuild.flds = &_q.ctx.Fields
+	grbuild.label = promocodeusage.Label
+	grbuild.scan = grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		PromoCodeID int64 `json:"promo_code_id,omitempty"`
+//	}
+//
+//	client.PromoCodeUsage.Query().
+//		Select(promocodeusage.FieldPromoCodeID).
+//		Scan(ctx, &v)
+func (_q *PromoCodeUsageQuery) Select(fields ...string) *PromoCodeUsageSelect {
+	_q.ctx.Fields = append(_q.ctx.Fields, fields...)
+	sbuild := &PromoCodeUsageSelect{PromoCodeUsageQuery: _q}
+	sbuild.label = promocodeusage.Label
+	sbuild.flds, sbuild.scan = &_q.ctx.Fields, sbuild.Scan
+	return sbuild
+}
+
+// Aggregate returns a PromoCodeUsageSelect configured with the given aggregations.
+func (_q *PromoCodeUsageQuery) Aggregate(fns ...AggregateFunc) *PromoCodeUsageSelect {
+	return _q.Select().Aggregate(fns...)
+}
+
+func (_q *PromoCodeUsageQuery) prepareQuery(ctx context.Context) error {
+	for _, inter := range _q.inters {
+		if inter == nil {
+			return fmt.Errorf("ent: uninitialized interceptor (forgotten import ent/runtime?)")
+		}
+		if trv, ok := inter.(Traverser); ok {
+			if err := trv.Traverse(ctx, _q); err != nil {
+				return err
+			}
+		}
+	}
+	for _, f := range _q.ctx.Fields {
+		if !promocodeusage.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if _q.path != nil {
+		prev, err := _q.path(ctx)
+		if err != nil {
+			return err
+		}
+		_q.sql = prev
+	}
+	return nil
+}
+
+func (_q *PromoCodeUsageQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*PromoCodeUsage, error) {
+	var (
+		nodes       = []*PromoCodeUsage{}
+		_spec       = _q.querySpec()
+		loadedTypes = [2]bool{
+			_q.withPromoCode != nil,
+			_q.withUser != nil,
+		}
+	)
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*PromoCodeUsage).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &PromoCodeUsage{config: _q.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, _q.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := _q.withPromoCode; query != nil {
+		if err := _q.loadPromoCode(ctx, query, nodes, nil,
+			func(n *PromoCodeUsage, e *PromoCode) { n.Edges.PromoCode = e }); err != nil {
+			return nil, err
+		}
+	}
+	if query := _q.withUser; query != nil {
+		if err := _q.loadUser(ctx, query, nodes, nil,
+			func(n *PromoCodeUsage, e *User) { n.Edges.User = e }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (_q *PromoCodeUsageQuery) loadPromoCode(ctx context.Context, query *PromoCodeQuery, nodes []*PromoCodeUsage, init func(*PromoCodeUsage), assign func(*PromoCodeUsage, *PromoCode)) error {
+	ids := make([]int64, 0, len(nodes))
+	nodeids := make(map[int64][]*PromoCodeUsage)
+	for i := range nodes {
+		fk := nodes[i].PromoCodeID
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	if len(ids) == 0 {
+		return nil
+	}
+	query.Where(promocode.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "promo_code_id" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+func (_q *PromoCodeUsageQuery) loadUser(ctx context.Context, query *UserQuery, nodes []*PromoCodeUsage, init func(*PromoCodeUsage), assign func(*PromoCodeUsage, *User)) error {
+	ids := make([]int64, 0, len(nodes))
+	nodeids := make(map[int64][]*PromoCodeUsage)
+	for i := range nodes {
+		fk := nodes[i].UserID
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	if len(ids) == 0 {
+		return nil
+	}
+	query.Where(user.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "user_id" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+
+func (_q *PromoCodeUsageQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
+	_spec.Node.Columns = _q.ctx.Fields
+	if len(_q.ctx.Fields) > 0 {
+		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
+	}
+	return sqlgraph.CountNodes(ctx, _q.driver, _spec)
+}
+
+func (_q *PromoCodeUsageQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := sqlgraph.NewQuerySpec(promocodeusage.Table, promocodeusage.Columns, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	_spec.From = _q.sql
+	if unique := _q.ctx.Unique; unique != nil {
+		_spec.Unique = *unique
+	} else if _q.path != nil {
+		_spec.Unique = true
+	}
+	if fields := _q.ctx.Fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, promocodeusage.FieldID)
+		for i := range fields {
+			if fields[i] != promocodeusage.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+		if _q.withPromoCode != nil {
+			_spec.Node.AddColumnOnce(promocodeusage.FieldPromoCodeID)
+		}
+		if _q.withUser != nil {
+			_spec.Node.AddColumnOnce(promocodeusage.FieldUserID)
+		}
+	}
+	if ps := _q.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := _q.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (_q *PromoCodeUsageQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(_q.driver.Dialect())
+	t1 := builder.Table(promocodeusage.Table)
+	columns := _q.ctx.Fields
+	if len(columns) == 0 {
+		columns = promocodeusage.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if _q.sql != nil {
+		selector = _q.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if _q.ctx.Unique != nil && *_q.ctx.Unique {
+		selector.Distinct()
+	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
+	for _, p := range _q.predicates {
+		p(selector)
+	}
+	for _, p := range _q.order {
+		p(selector)
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		// limit is mandatory for offset clause. We start
+		// with default value, and override it below if needed.
+		selector.Offset(*offset).Limit(math.MaxInt32)
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *PromoCodeUsageQuery) ForUpdate(opts ...sql.LockOption) *PromoCodeUsageQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *PromoCodeUsageQuery) ForShare(opts ...sql.LockOption) *PromoCodeUsageQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
+// PromoCodeUsageGroupBy is the group-by builder for PromoCodeUsage entities.
+type PromoCodeUsageGroupBy struct {
+	selector
+	build *PromoCodeUsageQuery
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (_g *PromoCodeUsageGroupBy) Aggregate(fns ...AggregateFunc) *PromoCodeUsageGroupBy {
+	_g.fns = append(_g.fns, fns...)
+	return _g
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_g *PromoCodeUsageGroupBy) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _g.build.ctx, ent.OpQueryGroupBy)
+	if err := _g.build.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PromoCodeUsageQuery, *PromoCodeUsageGroupBy](ctx, _g.build, _g, _g.build.inters, v)
+}
+
+func (_g *PromoCodeUsageGroupBy) sqlScan(ctx context.Context, root *PromoCodeUsageQuery, v any) error {
+	selector := root.sqlQuery(ctx).Select()
+	aggregation := make([]string, 0, len(_g.fns))
+	for _, fn := range _g.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(*_g.flds)+len(_g.fns))
+		for _, f := range *_g.flds {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	selector.GroupBy(selector.Columns(*_g.flds...)...)
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _g.build.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+// PromoCodeUsageSelect is the builder for selecting fields of PromoCodeUsage entities.
+type PromoCodeUsageSelect struct {
+	*PromoCodeUsageQuery
+	selector
+}
+
+// Aggregate adds the given aggregation functions to the selector query.
+func (_s *PromoCodeUsageSelect) Aggregate(fns ...AggregateFunc) *PromoCodeUsageSelect {
+	_s.fns = append(_s.fns, fns...)
+	return _s
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_s *PromoCodeUsageSelect) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _s.ctx, ent.OpQuerySelect)
+	if err := _s.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PromoCodeUsageQuery, *PromoCodeUsageSelect](ctx, _s.PromoCodeUsageQuery, _s, _s.inters, v)
+}
+
+func (_s *PromoCodeUsageSelect) sqlScan(ctx context.Context, root *PromoCodeUsageQuery, v any) error {
+	selector := root.sqlQuery(ctx)
+	aggregation := make([]string, 0, len(_s.fns))
+	for _, fn := range _s.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	switch n := len(*_s.selector.flds); {
+	case n == 0 && len(aggregation) > 0:
+		selector.Select(aggregation...)
+	case n != 0 && len(aggregation) > 0:
+		selector.AppendSelect(aggregation...)
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _s.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}

backend/ent/promocodeusage_update.go

+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/ent/user"
+)
+
+// PromoCodeUsageUpdate is the builder for updating PromoCodeUsage entities.
+type PromoCodeUsageUpdate struct {
+	config
+	hooks    []Hook
+	mutation *PromoCodeUsageMutation
+}
+
+// Where appends a list predicates to the PromoCodeUsageUpdate builder.
+func (_u *PromoCodeUsageUpdate) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageUpdate {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (_u *PromoCodeUsageUpdate) SetPromoCodeID(v int64) *PromoCodeUsageUpdate {
+	_u.mutation.SetPromoCodeID(v)
+	return _u
+}
+
+// SetNillablePromoCodeID sets the "promo_code_id" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdate) SetNillablePromoCodeID(v *int64) *PromoCodeUsageUpdate {
+	if v != nil {
+		_u.SetPromoCodeID(*v)
+	}
+	return _u
+}
+
+// SetUserID sets the "user_id" field.
+func (_u *PromoCodeUsageUpdate) SetUserID(v int64) *PromoCodeUsageUpdate {
+	_u.mutation.SetUserID(v)
+	return _u
+}
+
+// SetNillableUserID sets the "user_id" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdate) SetNillableUserID(v *int64) *PromoCodeUsageUpdate {
+	if v != nil {
+		_u.SetUserID(*v)
+	}
+	return _u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_u *PromoCodeUsageUpdate) SetBonusAmount(v float64) *PromoCodeUsageUpdate {
+	_u.mutation.ResetBonusAmount()
+	_u.mutation.SetBonusAmount(v)
+	return _u
+}
+
+// SetNillableBonusAmount sets the "bonus_amount" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdate) SetNillableBonusAmount(v *float64) *PromoCodeUsageUpdate {
+	if v != nil {
+		_u.SetBonusAmount(*v)
+	}
+	return _u
+}
+
+// AddBonusAmount adds value to the "bonus_amount" field.
+func (_u *PromoCodeUsageUpdate) AddBonusAmount(v float64) *PromoCodeUsageUpdate {
+	_u.mutation.AddBonusAmount(v)
+	return _u
+}
+
+// SetUsedAt sets the "used_at" field.
+func (_u *PromoCodeUsageUpdate) SetUsedAt(v time.Time) *PromoCodeUsageUpdate {
+	_u.mutation.SetUsedAt(v)
+	return _u
+}
+
+// SetNillableUsedAt sets the "used_at" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdate) SetNillableUsedAt(v *time.Time) *PromoCodeUsageUpdate {
+	if v != nil {
+		_u.SetUsedAt(*v)
+	}
+	return _u
+}
+
+// SetPromoCode sets the "promo_code" edge to the PromoCode entity.
+func (_u *PromoCodeUsageUpdate) SetPromoCode(v *PromoCode) *PromoCodeUsageUpdate {
+	return _u.SetPromoCodeID(v.ID)
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_u *PromoCodeUsageUpdate) SetUser(v *User) *PromoCodeUsageUpdate {
+	return _u.SetUserID(v.ID)
+}
+
+// Mutation returns the PromoCodeUsageMutation object of the builder.
+func (_u *PromoCodeUsageUpdate) Mutation() *PromoCodeUsageMutation {
+	return _u.mutation
+}
+
+// ClearPromoCode clears the "promo_code" edge to the PromoCode entity.
+func (_u *PromoCodeUsageUpdate) ClearPromoCode() *PromoCodeUsageUpdate {
+	_u.mutation.ClearPromoCode()
+	return _u
+}
+
+// ClearUser clears the "user" edge to the User entity.
+func (_u *PromoCodeUsageUpdate) ClearUser() *PromoCodeUsageUpdate {
+	_u.mutation.ClearUser()
+	return _u
+}
+
+// Save executes the query and returns the number of nodes affected by the update operation.
+func (_u *PromoCodeUsageUpdate) Save(ctx context.Context) (int, error) {
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *PromoCodeUsageUpdate) SaveX(ctx context.Context) int {
+	affected, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return affected
+}
+
+// Exec executes the query.
+func (_u *PromoCodeUsageUpdate) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *PromoCodeUsageUpdate) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *PromoCodeUsageUpdate) check() error {
+	if _u.mutation.PromoCodeCleared() && len(_u.mutation.PromoCodeIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "PromoCodeUsage.promo_code"`)
+	}
+	if _u.mutation.UserCleared() && len(_u.mutation.UserIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "PromoCodeUsage.user"`)
+	}
+	return nil
+}
+
+func (_u *PromoCodeUsageUpdate) sqlSave(ctx context.Context) (_node int, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(promocodeusage.Table, promocodeusage.Columns, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.BonusAmount(); ok {
+		_spec.SetField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.AddedBonusAmount(); ok {
+		_spec.AddField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.UsedAt(); ok {
+		_spec.SetField(promocodeusage.FieldUsedAt, field.TypeTime, value)
+	}
+	if _u.mutation.PromoCodeCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.PromoCodeIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _u.mutation.UserCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UserIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _node, err = sqlgraph.UpdateNodes(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{promocodeusage.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return 0, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}
+
+// PromoCodeUsageUpdateOne is the builder for updating a single PromoCodeUsage entity.
+type PromoCodeUsageUpdateOne struct {
+	config
+	fields   []string
+	hooks    []Hook
+	mutation *PromoCodeUsageMutation
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (_u *PromoCodeUsageUpdateOne) SetPromoCodeID(v int64) *PromoCodeUsageUpdateOne {
+	_u.mutation.SetPromoCodeID(v)
+	return _u
+}
+
+// SetNillablePromoCodeID sets the "promo_code_id" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdateOne) SetNillablePromoCodeID(v *int64) *PromoCodeUsageUpdateOne {
+	if v != nil {
+		_u.SetPromoCodeID(*v)
+	}
+	return _u
+}
+
+// SetUserID sets the "user_id" field.
+func (_u *PromoCodeUsageUpdateOne) SetUserID(v int64) *PromoCodeUsageUpdateOne {
+	_u.mutation.SetUserID(v)
+	return _u
+}
+
+// SetNillableUserID sets the "user_id" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdateOne) SetNillableUserID(v *int64) *PromoCodeUsageUpdateOne {
+	if v != nil {
+		_u.SetUserID(*v)
+	}
+	return _u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_u *PromoCodeUsageUpdateOne) SetBonusAmount(v float64) *PromoCodeUsageUpdateOne {
+	_u.mutation.ResetBonusAmount()
+	_u.mutation.SetBonusAmount(v)
+	return _u
+}
+
+// SetNillableBonusAmount sets the "bonus_amount" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdateOne) SetNillableBonusAmount(v *float64) *PromoCodeUsageUpdateOne {
+	if v != nil {
+		_u.SetBonusAmount(*v)
+	}
+	return _u
+}
+
+// AddBonusAmount adds value to the "bonus_amount" field.
+func (_u *PromoCodeUsageUpdateOne) AddBonusAmount(v float64) *PromoCodeUsageUpdateOne {
+	_u.mutation.AddBonusAmount(v)
+	return _u
+}
+
+// SetUsedAt sets the "used_at" field.
+func (_u *PromoCodeUsageUpdateOne) SetUsedAt(v time.Time) *PromoCodeUsageUpdateOne {
+	_u.mutation.SetUsedAt(v)
+	return _u
+}
+
+// SetNillableUsedAt sets the "used_at" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdateOne) SetNillableUsedAt(v *time.Time) *PromoCodeUsageUpdateOne {
+	if v != nil {
+		_u.SetUsedAt(*v)
+	}
+	return _u
+}
+
+// SetPromoCode sets the "promo_code" edge to the PromoCode entity.
+func (_u *PromoCodeUsageUpdateOne) SetPromoCode(v *PromoCode) *PromoCodeUsageUpdateOne {
+	return _u.SetPromoCodeID(v.ID)
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_u *PromoCodeUsageUpdateOne) SetUser(v *User) *PromoCodeUsageUpdateOne {
+	return _u.SetUserID(v.ID)
+}
+
+// Mutation returns the PromoCodeUsageMutation object of the builder.
+func (_u *PromoCodeUsageUpdateOne) Mutation() *PromoCodeUsageMutation {
+	return _u.mutation
+}
+
+// ClearPromoCode clears the "promo_code" edge to the PromoCode entity.
+func (_u *PromoCodeUsageUpdateOne) ClearPromoCode() *PromoCodeUsageUpdateOne {
+	_u.mutation.ClearPromoCode()
+	return _u
+}
+
+// ClearUser clears the "user" edge to the User entity.
+func (_u *PromoCodeUsageUpdateOne) ClearUser() *PromoCodeUsageUpdateOne {
+	_u.mutation.ClearUser()
+	return _u
+}
+
+// Where appends a list predicates to the PromoCodeUsageUpdate builder.
+func (_u *PromoCodeUsageUpdateOne) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageUpdateOne {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// Select allows selecting one or more fields (columns) of the returned entity.
+// The default is selecting all fields defined in the entity schema.
+func (_u *PromoCodeUsageUpdateOne) Select(field string, fields ...string) *PromoCodeUsageUpdateOne {
+	_u.fields = append([]string{field}, fields...)
+	return _u
+}
+
+// Save executes the query and returns the updated PromoCodeUsage entity.
+func (_u *PromoCodeUsageUpdateOne) Save(ctx context.Context) (*PromoCodeUsage, error) {
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *PromoCodeUsageUpdateOne) SaveX(ctx context.Context) *PromoCodeUsage {
+	node, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// Exec executes the query on the entity.
+func (_u *PromoCodeUsageUpdateOne) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *PromoCodeUsageUpdateOne) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *PromoCodeUsageUpdateOne) check() error {
+	if _u.mutation.PromoCodeCleared() && len(_u.mutation.PromoCodeIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "PromoCodeUsage.promo_code"`)
+	}
+	if _u.mutation.UserCleared() && len(_u.mutation.UserIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "PromoCodeUsage.user"`)
+	}
+	return nil
+}
+
+func (_u *PromoCodeUsageUpdateOne) sqlSave(ctx context.Context) (_node *PromoCodeUsage, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(promocodeusage.Table, promocodeusage.Columns, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	id, ok := _u.mutation.ID()
+	if !ok {
+		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "PromoCodeUsage.id" for update`)}
+	}
+	_spec.Node.ID.Value = id
+	if fields := _u.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, promocodeusage.FieldID)
+		for _, f := range fields {
+			if !promocodeusage.ValidColumn(f) {
+				return nil, &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+			}
+			if f != promocodeusage.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, f)
+			}
+		}
+	}
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.BonusAmount(); ok {
+		_spec.SetField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.AddedBonusAmount(); ok {
+		_spec.AddField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.UsedAt(); ok {
+		_spec.SetField(promocodeusage.FieldUsedAt, field.TypeTime, value)
+	}
+	if _u.mutation.PromoCodeCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.PromoCodeIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _u.mutation.UserCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UserIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	_node = &PromoCodeUsage{config: _u.config}
+	_spec.Assign = _node.assignValues
+	_spec.ScanValues = _node.scanValues
+	if err = sqlgraph.UpdateNode(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{promocodeusage.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}

backend/ent/proxy_query.go

@@ -9,6 +9,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -25,6 +26,7 @@ type ProxyQuery struct {
 	inters       []Interceptor
 	predicates   []predicate.Proxy
 	withAccounts *AccountQuery
+	modifiers    []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -384,6 +386,9 @@ func (_q *ProxyQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Proxy,
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -439,6 +444,9 @@ func (_q *ProxyQuery) loadAccounts(ctx context.Context, query *AccountQuery, nod
 
 func (_q *ProxyQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -501,6 +509,9 @@ func (_q *ProxyQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -518,6 +529,32 @@ func (_q *ProxyQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *ProxyQuery) ForUpdate(opts ...sql.LockOption) *ProxyQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *ProxyQuery) ForShare(opts ...sql.LockOption) *ProxyQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // ProxyGroupBy is the group-by builder for Proxy entities.
 type ProxyGroupBy struct {
 	selector

backend/ent/redeemcode_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -26,6 +27,7 @@ type RedeemCodeQuery struct {
 	predicates []predicate.RedeemCode
 	withUser   *UserQuery
 	withGroup  *GroupQuery
+	modifiers  []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -420,6 +422,9 @@ func (_q *RedeemCodeQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*R
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -511,6 +516,9 @@ func (_q *RedeemCodeQuery) loadGroup(ctx context.Context, query *GroupQuery, nod
 
 func (_q *RedeemCodeQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -579,6 +587,9 @@ func (_q *RedeemCodeQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -596,6 +607,32 @@ func (_q *RedeemCodeQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *RedeemCodeQuery) ForUpdate(opts ...sql.LockOption) *RedeemCodeQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *RedeemCodeQuery) ForShare(opts ...sql.LockOption) *RedeemCodeQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // RedeemCodeGroupBy is the group-by builder for RedeemCode entities.
 type RedeemCodeGroupBy struct {
 	selector

backend/ent/runtime/runtime.go

@@ -9,6 +9,8 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/accountgroup"
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/group"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/proxy"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
 	"github.com/Wei-Shaw/sub2api/ent/schema"
@@ -274,6 +276,60 @@ func init() {
 	groupDescClaudeCodeOnly := groupFields[14].Descriptor()
 	// group.DefaultClaudeCodeOnly holds the default value on creation for the claude_code_only field.
 	group.DefaultClaudeCodeOnly = groupDescClaudeCodeOnly.Default.(bool)
+	promocodeFields := schema.PromoCode{}.Fields()
+	_ = promocodeFields
+	// promocodeDescCode is the schema descriptor for code field.
+	promocodeDescCode := promocodeFields[0].Descriptor()
+	// promocode.CodeValidator is a validator for the "code" field. It is called by the builders before save.
+	promocode.CodeValidator = func() func(string) error {
+		validators := promocodeDescCode.Validators
+		fns := [...]func(string) error{
+			validators[0].(func(string) error),
+			validators[1].(func(string) error),
+		}
+		return func(code string) error {
+			for _, fn := range fns {
+				if err := fn(code); err != nil {
+					return err
+				}
+			}
+			return nil
+		}
+	}()
+	// promocodeDescBonusAmount is the schema descriptor for bonus_amount field.
+	promocodeDescBonusAmount := promocodeFields[1].Descriptor()
+	// promocode.DefaultBonusAmount holds the default value on creation for the bonus_amount field.
+	promocode.DefaultBonusAmount = promocodeDescBonusAmount.Default.(float64)
+	// promocodeDescMaxUses is the schema descriptor for max_uses field.
+	promocodeDescMaxUses := promocodeFields[2].Descriptor()
+	// promocode.DefaultMaxUses holds the default value on creation for the max_uses field.
+	promocode.DefaultMaxUses = promocodeDescMaxUses.Default.(int)
+	// promocodeDescUsedCount is the schema descriptor for used_count field.
+	promocodeDescUsedCount := promocodeFields[3].Descriptor()
+	// promocode.DefaultUsedCount holds the default value on creation for the used_count field.
+	promocode.DefaultUsedCount = promocodeDescUsedCount.Default.(int)
+	// promocodeDescStatus is the schema descriptor for status field.
+	promocodeDescStatus := promocodeFields[4].Descriptor()
+	// promocode.DefaultStatus holds the default value on creation for the status field.
+	promocode.DefaultStatus = promocodeDescStatus.Default.(string)
+	// promocode.StatusValidator is a validator for the "status" field. It is called by the builders before save.
+	promocode.StatusValidator = promocodeDescStatus.Validators[0].(func(string) error)
+	// promocodeDescCreatedAt is the schema descriptor for created_at field.
+	promocodeDescCreatedAt := promocodeFields[7].Descriptor()
+	// promocode.DefaultCreatedAt holds the default value on creation for the created_at field.
+	promocode.DefaultCreatedAt = promocodeDescCreatedAt.Default.(func() time.Time)
+	// promocodeDescUpdatedAt is the schema descriptor for updated_at field.
+	promocodeDescUpdatedAt := promocodeFields[8].Descriptor()
+	// promocode.DefaultUpdatedAt holds the default value on creation for the updated_at field.
+	promocode.DefaultUpdatedAt = promocodeDescUpdatedAt.Default.(func() time.Time)
+	// promocode.UpdateDefaultUpdatedAt holds the default value on update for the updated_at field.
+	promocode.UpdateDefaultUpdatedAt = promocodeDescUpdatedAt.UpdateDefault.(func() time.Time)
+	promocodeusageFields := schema.PromoCodeUsage{}.Fields()
+	_ = promocodeusageFields
+	// promocodeusageDescUsedAt is the schema descriptor for used_at field.
+	promocodeusageDescUsedAt := promocodeusageFields[3].Descriptor()
+	// promocodeusage.DefaultUsedAt holds the default value on creation for the used_at field.
+	promocodeusage.DefaultUsedAt = promocodeusageDescUsedAt.Default.(func() time.Time)
 	proxyMixin := schema.Proxy{}.Mixin()
 	proxyMixinHooks1 := proxyMixin[1].Hooks()
 	proxy.Hooks[0] = proxyMixinHooks1[0]

backend/ent/schema/promo_code.go

+package schema
+
+import (
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/service"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/entsql"
+	"entgo.io/ent/schema"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+)
+
+// PromoCode holds the schema definition for the PromoCode entity.
+//
+// 注册优惠码：用户注册时使用，可获得赠送余额
+// 与 RedeemCode 不同，PromoCode 支持多次使用（有使用次数限制）
+//
+// 删除策略：硬删除
+type PromoCode struct {
+	ent.Schema
+}
+
+func (PromoCode) Annotations() []schema.Annotation {
+	return []schema.Annotation{
+		entsql.Annotation{Table: "promo_codes"},
+	}
+}
+
+func (PromoCode) Fields() []ent.Field {
+	return []ent.Field{
+		field.String("code").
+			MaxLen(32).
+			NotEmpty().
+			Unique().
+			Comment("优惠码"),
+		field.Float("bonus_amount").
+			SchemaType(map[string]string{dialect.Postgres: "decimal(20,8)"}).
+			Default(0).
+			Comment("赠送余额金额"),
+		field.Int("max_uses").
+			Default(0).
+			Comment("最大使用次数，0表示无限制"),
+		field.Int("used_count").
+			Default(0).
+			Comment("已使用次数"),
+		field.String("status").
+			MaxLen(20).
+			Default(service.PromoCodeStatusActive).
+			Comment("状态: active, disabled"),
+		field.Time("expires_at").
+			Optional().
+			Nillable().
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}).
+			Comment("过期时间，null表示永不过期"),
+		field.String("notes").
+			Optional().
+			Nillable().
+			SchemaType(map[string]string{dialect.Postgres: "text"}).
+			Comment("备注"),
+		field.Time("created_at").
+			Immutable().
+			Default(time.Now).
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}),
+		field.Time("updated_at").
+			Default(time.Now).
+			UpdateDefault(time.Now).
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}),
+	}
+}
+
+func (PromoCode) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.To("usage_records", PromoCodeUsage.Type),
+	}
+}
+
+func (PromoCode) Indexes() []ent.Index {
+	return []ent.Index{
+		// code 字段已在 Fields() 中声明 Unique()，无需重复索引
+		index.Fields("status"),
+		index.Fields("expires_at"),
+	}
+}

backend/ent/schema/promo_code_usage.go

+package schema
+
+import (
+	"time"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/entsql"
+	"entgo.io/ent/schema"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+)
+
+// PromoCodeUsage holds the schema definition for the PromoCodeUsage entity.
+//
+// 优惠码使用记录：记录每个用户使用优惠码的情况
+type PromoCodeUsage struct {
+	ent.Schema
+}
+
+func (PromoCodeUsage) Annotations() []schema.Annotation {
+	return []schema.Annotation{
+		entsql.Annotation{Table: "promo_code_usages"},
+	}
+}
+
+func (PromoCodeUsage) Fields() []ent.Field {
+	return []ent.Field{
+		field.Int64("promo_code_id").
+			Comment("优惠码ID"),
+		field.Int64("user_id").
+			Comment("使用用户ID"),
+		field.Float("bonus_amount").
+			SchemaType(map[string]string{dialect.Postgres: "decimal(20,8)"}).
+			Comment("实际赠送金额"),
+		field.Time("used_at").
+			Default(time.Now).
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}).
+			Comment("使用时间"),
+	}
+}
+
+func (PromoCodeUsage) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.From("promo_code", PromoCode.Type).
+			Ref("usage_records").
+			Field("promo_code_id").
+			Required().
+			Unique(),
+		edge.From("user", User.Type).
+			Ref("promo_code_usages").
+			Field("user_id").
+			Required().
+			Unique(),
+	}
+}
+
+func (PromoCodeUsage) Indexes() []ent.Index {
+	return []ent.Index{
+		index.Fields("promo_code_id"),
+		index.Fields("user_id"),
+		// 每个用户每个优惠码只能使用一次
+		index.Fields("promo_code_id", "user_id").Unique(),
+	}
+}

backend/ent/schema/user.go

@@ -74,6 +74,7 @@ func (User) Edges() []ent.Edge {
 			Through("user_allowed_groups", UserAllowedGroup.Type),
 		edge.To("usage_logs", UsageLog.Type),
 		edge.To("attribute_values", UserAttributeValue.Type),
+		edge.To("promo_code_usages", PromoCodeUsage.Type),
 	}
 }
 

backend/ent/setting_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -22,6 +23,7 @@ type SettingQuery struct {
 	order      []setting.OrderOption
 	inters     []Interceptor
 	predicates []predicate.Setting
+	modifiers  []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -343,6 +345,9 @@ func (_q *SettingQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Sett
 		nodes = append(nodes, node)
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -357,6 +362,9 @@ func (_q *SettingQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Sett
 
 func (_q *SettingQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -419,6 +427,9 @@ func (_q *SettingQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -436,6 +447,32 @@ func (_q *SettingQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *SettingQuery) ForUpdate(opts ...sql.LockOption) *SettingQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *SettingQuery) ForShare(opts ...sql.LockOption) *SettingQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // SettingGroupBy is the group-by builder for Setting entities.
 type SettingGroupBy struct {
 	selector

backend/ent/tx.go

@@ -22,6 +22,10 @@ type Tx struct {
 	AccountGroup *AccountGroupClient
 	// Group is the client for interacting with the Group builders.
 	Group *GroupClient
+	// PromoCode is the client for interacting with the PromoCode builders.
+	PromoCode *PromoCodeClient
+	// PromoCodeUsage is the client for interacting with the PromoCodeUsage builders.
+	PromoCodeUsage *PromoCodeUsageClient
 	// Proxy is the client for interacting with the Proxy builders.
 	Proxy *ProxyClient
 	// RedeemCode is the client for interacting with the RedeemCode builders.
@@ -175,6 +179,8 @@ func (tx *Tx) init() {
 	tx.Account = NewAccountClient(tx.config)
 	tx.AccountGroup = NewAccountGroupClient(tx.config)
 	tx.Group = NewGroupClient(tx.config)
+	tx.PromoCode = NewPromoCodeClient(tx.config)
+	tx.PromoCodeUsage = NewPromoCodeUsageClient(tx.config)
 	tx.Proxy = NewProxyClient(tx.config)
 	tx.RedeemCode = NewRedeemCodeClient(tx.config)
 	tx.Setting = NewSettingClient(tx.config)

backend/ent/usagelog_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -32,6 +33,7 @@ type UsageLogQuery struct {
 	withAccount      *AccountQuery
 	withGroup        *GroupQuery
 	withSubscription *UserSubscriptionQuery
+	modifiers        []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -531,6 +533,9 @@ func (_q *UsageLogQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Usa
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -727,6 +732,9 @@ func (_q *UsageLogQuery) loadSubscription(ctx context.Context, query *UserSubscr
 
 func (_q *UsageLogQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -804,6 +812,9 @@ func (_q *UsageLogQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -821,6 +832,32 @@ func (_q *UsageLogQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *UsageLogQuery) ForUpdate(opts ...sql.LockOption) *UsageLogQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *UsageLogQuery) ForShare(opts ...sql.LockOption) *UsageLogQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // UsageLogGroupBy is the group-by builder for UsageLog entities.
 type UsageLogGroupBy struct {
 	selector

backend/ent/user.go

@@ -61,11 +61,13 @@ type UserEdges struct {
 	UsageLogs []*UsageLog `json:"usage_logs,omitempty"`
 	// AttributeValues holds the value of the attribute_values edge.
 	AttributeValues []*UserAttributeValue `json:"attribute_values,omitempty"`
+	// PromoCodeUsages holds the value of the promo_code_usages edge.
+	PromoCodeUsages []*PromoCodeUsage `json:"promo_code_usages,omitempty"`
 	// UserAllowedGroups holds the value of the user_allowed_groups edge.
 	UserAllowedGroups []*UserAllowedGroup `json:"user_allowed_groups,omitempty"`
 	// loadedTypes holds the information for reporting if a
 	// type was loaded (or requested) in eager-loading or not.
-	loadedTypes [8]bool
+	loadedTypes [9]bool
 }
 
 // APIKeysOrErr returns the APIKeys value or an error if the edge
@@ -131,10 +133,19 @@ func (e UserEdges) AttributeValuesOrErr() ([]*UserAttributeValue, error) {
 	return nil, &NotLoadedError{edge: "attribute_values"}
 }
 
+// PromoCodeUsagesOrErr returns the PromoCodeUsages value or an error if the edge
+// was not loaded in eager-loading.
+func (e UserEdges) PromoCodeUsagesOrErr() ([]*PromoCodeUsage, error) {
+	if e.loadedTypes[7] {
+		return e.PromoCodeUsages, nil
+	}
+	return nil, &NotLoadedError{edge: "promo_code_usages"}
+}
+
 // UserAllowedGroupsOrErr returns the UserAllowedGroups value or an error if the edge
 // was not loaded in eager-loading.
 func (e UserEdges) UserAllowedGroupsOrErr() ([]*UserAllowedGroup, error) {
-	if e.loadedTypes[7] {
+	if e.loadedTypes[8] {
 		return e.UserAllowedGroups, nil
 	}
 	return nil, &NotLoadedError{edge: "user_allowed_groups"}
@@ -289,6 +300,11 @@ func (_m *User) QueryAttributeValues() *UserAttributeValueQuery {
 	return NewUserClient(_m.config).QueryAttributeValues(_m)
 }
 
+// QueryPromoCodeUsages queries the "promo_code_usages" edge of the User entity.
+func (_m *User) QueryPromoCodeUsages() *PromoCodeUsageQuery {
+	return NewUserClient(_m.config).QueryPromoCodeUsages(_m)
+}
+
 // QueryUserAllowedGroups queries the "user_allowed_groups" edge of the User entity.
 func (_m *User) QueryUserAllowedGroups() *UserAllowedGroupQuery {
 	return NewUserClient(_m.config).QueryUserAllowedGroups(_m)

backend/ent/user/user.go

@@ -51,6 +51,8 @@ const (
 	EdgeUsageLogs = "usage_logs"
 	// EdgeAttributeValues holds the string denoting the attribute_values edge name in mutations.
 	EdgeAttributeValues = "attribute_values"
+	// EdgePromoCodeUsages holds the string denoting the promo_code_usages edge name in mutations.
+	EdgePromoCodeUsages = "promo_code_usages"
 	// EdgeUserAllowedGroups holds the string denoting the user_allowed_groups edge name in mutations.
 	EdgeUserAllowedGroups = "user_allowed_groups"
 	// Table holds the table name of the user in the database.
@@ -102,6 +104,13 @@ const (
 	AttributeValuesInverseTable = "user_attribute_values"
 	// AttributeValuesColumn is the table column denoting the attribute_values relation/edge.
 	AttributeValuesColumn = "user_id"
+	// PromoCodeUsagesTable is the table that holds the promo_code_usages relation/edge.
+	PromoCodeUsagesTable = "promo_code_usages"
+	// PromoCodeUsagesInverseTable is the table name for the PromoCodeUsage entity.
+	// It exists in this package in order to avoid circular dependency with the "promocodeusage" package.
+	PromoCodeUsagesInverseTable = "promo_code_usages"
+	// PromoCodeUsagesColumn is the table column denoting the promo_code_usages relation/edge.
+	PromoCodeUsagesColumn = "user_id"
 	// UserAllowedGroupsTable is the table that holds the user_allowed_groups relation/edge.
 	UserAllowedGroupsTable = "user_allowed_groups"
 	// UserAllowedGroupsInverseTable is the table name for the UserAllowedGroup entity.
@@ -342,6 +351,20 @@ func ByAttributeValues(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
 	}
 }
 
+// ByPromoCodeUsagesCount orders the results by promo_code_usages count.
+func ByPromoCodeUsagesCount(opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborsCount(s, newPromoCodeUsagesStep(), opts...)
+	}
+}
+
+// ByPromoCodeUsages orders the results by promo_code_usages terms.
+func ByPromoCodeUsages(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newPromoCodeUsagesStep(), append([]sql.OrderTerm{term}, terms...)...)
+	}
+}
+
 // ByUserAllowedGroupsCount orders the results by user_allowed_groups count.
 func ByUserAllowedGroupsCount(opts ...sql.OrderTermOption) OrderOption {
 	return func(s *sql.Selector) {
@@ -404,6 +427,13 @@ func newAttributeValuesStep() *sqlgraph.Step {
 		sqlgraph.Edge(sqlgraph.O2M, false, AttributeValuesTable, AttributeValuesColumn),
 	)
 }
+func newPromoCodeUsagesStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(PromoCodeUsagesInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.O2M, false, PromoCodeUsagesTable, PromoCodeUsagesColumn),
+	)
+}
 func newUserAllowedGroupsStep() *sqlgraph.Step {
 	return sqlgraph.NewStep(
 		sqlgraph.From(Table, FieldID),