feat(backend): add user custom attributes system

Add a flexible user attribute system that allows admins to define
custom fields for users (text, textarea, number, email, url, date,
select, multi_select types).

- Add Ent schemas for UserAttributeDefinition and UserAttributeValue
- Add service layer with validation logic
- Add repository layer with batch operations support
- Add admin API endpoints for CRUD and reorder operations
- Add batch API for loading attribute values for multiple users
- Add database migration (018_user_attributes.sql)

🤖 Generated with [Claude Code](https://claude.com/claude-code

)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/ent/userattributevalue/userattributevalue.go

+// Code generated by ent, DO NOT EDIT.
+
+package userattributevalue
+
+import (
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+const (
+	// Label holds the string label denoting the userattributevalue type in the database.
+	Label = "user_attribute_value"
+	// FieldID holds the string denoting the id field in the database.
+	FieldID = "id"
+	// FieldCreatedAt holds the string denoting the created_at field in the database.
+	FieldCreatedAt = "created_at"
+	// FieldUpdatedAt holds the string denoting the updated_at field in the database.
+	FieldUpdatedAt = "updated_at"
+	// FieldUserID holds the string denoting the user_id field in the database.
+	FieldUserID = "user_id"
+	// FieldAttributeID holds the string denoting the attribute_id field in the database.
+	FieldAttributeID = "attribute_id"
+	// FieldValue holds the string denoting the value field in the database.
+	FieldValue = "value"
+	// EdgeUser holds the string denoting the user edge name in mutations.
+	EdgeUser = "user"
+	// EdgeDefinition holds the string denoting the definition edge name in mutations.
+	EdgeDefinition = "definition"
+	// Table holds the table name of the userattributevalue in the database.
+	Table = "user_attribute_values"
+	// UserTable is the table that holds the user relation/edge.
+	UserTable = "user_attribute_values"
+	// 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"
+	// DefinitionTable is the table that holds the definition relation/edge.
+	DefinitionTable = "user_attribute_values"
+	// DefinitionInverseTable is the table name for the UserAttributeDefinition entity.
+	// It exists in this package in order to avoid circular dependency with the "userattributedefinition" package.
+	DefinitionInverseTable = "user_attribute_definitions"
+	// DefinitionColumn is the table column denoting the definition relation/edge.
+	DefinitionColumn = "attribute_id"
+)
+
+// Columns holds all SQL columns for userattributevalue fields.
+var Columns = []string{
+	FieldID,
+	FieldCreatedAt,
+	FieldUpdatedAt,
+	FieldUserID,
+	FieldAttributeID,
+	FieldValue,
+}
+
+// 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 (
+	// DefaultCreatedAt holds the default value on creation for the "created_at" field.
+	DefaultCreatedAt func() time.Time
+	// DefaultUpdatedAt holds the default value on creation for the "updated_at" field.
+	DefaultUpdatedAt func() time.Time
+	// UpdateDefaultUpdatedAt holds the default value on update for the "updated_at" field.
+	UpdateDefaultUpdatedAt func() time.Time
+	// DefaultValue holds the default value on creation for the "value" field.
+	DefaultValue string
+)
+
+// OrderOption defines the ordering options for the UserAttributeValue 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()
+}
+
+// ByCreatedAt orders the results by the created_at field.
+func ByCreatedAt(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldCreatedAt, opts...).ToFunc()
+}
+
+// ByUpdatedAt orders the results by the updated_at field.
+func ByUpdatedAt(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldUpdatedAt, opts...).ToFunc()
+}
+
+// ByUserID orders the results by the user_id field.
+func ByUserID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldUserID, opts...).ToFunc()
+}
+
+// ByAttributeID orders the results by the attribute_id field.
+func ByAttributeID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldAttributeID, opts...).ToFunc()
+}
+
+// ByValue orders the results by the value field.
+func ByValue(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldValue, opts...).ToFunc()
+}
+
+// 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...))
+	}
+}
+
+// ByDefinitionField orders the results by definition field.
+func ByDefinitionField(field string, opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newDefinitionStep(), sql.OrderByField(field, opts...))
+	}
+}
+func newUserStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(UserInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2O, true, UserTable, UserColumn),
+	)
+}
+func newDefinitionStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(DefinitionInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2O, true, DefinitionTable, DefinitionColumn),
+	)
+}

backend/ent/userattributevalue/where.go

+// Code generated by ent, DO NOT EDIT.
+
+package userattributevalue
+
+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.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldLTE(FieldID, id))
+}
+
+// CreatedAt applies equality check predicate on the "created_at" field. It's identical to CreatedAtEQ.
+func CreatedAt(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldCreatedAt, v))
+}
+
+// UpdatedAt applies equality check predicate on the "updated_at" field. It's identical to UpdatedAtEQ.
+func UpdatedAt(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldUpdatedAt, v))
+}
+
+// UserID applies equality check predicate on the "user_id" field. It's identical to UserIDEQ.
+func UserID(v int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldUserID, v))
+}
+
+// AttributeID applies equality check predicate on the "attribute_id" field. It's identical to AttributeIDEQ.
+func AttributeID(v int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldAttributeID, v))
+}
+
+// Value applies equality check predicate on the "value" field. It's identical to ValueEQ.
+func Value(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldValue, v))
+}
+
+// CreatedAtEQ applies the EQ predicate on the "created_at" field.
+func CreatedAtEQ(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldCreatedAt, v))
+}
+
+// CreatedAtNEQ applies the NEQ predicate on the "created_at" field.
+func CreatedAtNEQ(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNEQ(FieldCreatedAt, v))
+}
+
+// CreatedAtIn applies the In predicate on the "created_at" field.
+func CreatedAtIn(vs ...time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldIn(FieldCreatedAt, vs...))
+}
+
+// CreatedAtNotIn applies the NotIn predicate on the "created_at" field.
+func CreatedAtNotIn(vs ...time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNotIn(FieldCreatedAt, vs...))
+}
+
+// CreatedAtGT applies the GT predicate on the "created_at" field.
+func CreatedAtGT(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldGT(FieldCreatedAt, v))
+}
+
+// CreatedAtGTE applies the GTE predicate on the "created_at" field.
+func CreatedAtGTE(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldGTE(FieldCreatedAt, v))
+}
+
+// CreatedAtLT applies the LT predicate on the "created_at" field.
+func CreatedAtLT(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldLT(FieldCreatedAt, v))
+}
+
+// CreatedAtLTE applies the LTE predicate on the "created_at" field.
+func CreatedAtLTE(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldLTE(FieldCreatedAt, v))
+}
+
+// UpdatedAtEQ applies the EQ predicate on the "updated_at" field.
+func UpdatedAtEQ(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldUpdatedAt, v))
+}
+
+// UpdatedAtNEQ applies the NEQ predicate on the "updated_at" field.
+func UpdatedAtNEQ(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNEQ(FieldUpdatedAt, v))
+}
+
+// UpdatedAtIn applies the In predicate on the "updated_at" field.
+func UpdatedAtIn(vs ...time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldIn(FieldUpdatedAt, vs...))
+}
+
+// UpdatedAtNotIn applies the NotIn predicate on the "updated_at" field.
+func UpdatedAtNotIn(vs ...time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNotIn(FieldUpdatedAt, vs...))
+}
+
+// UpdatedAtGT applies the GT predicate on the "updated_at" field.
+func UpdatedAtGT(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldGT(FieldUpdatedAt, v))
+}
+
+// UpdatedAtGTE applies the GTE predicate on the "updated_at" field.
+func UpdatedAtGTE(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldGTE(FieldUpdatedAt, v))
+}
+
+// UpdatedAtLT applies the LT predicate on the "updated_at" field.
+func UpdatedAtLT(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldLT(FieldUpdatedAt, v))
+}
+
+// UpdatedAtLTE applies the LTE predicate on the "updated_at" field.
+func UpdatedAtLTE(v time.Time) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldLTE(FieldUpdatedAt, v))
+}
+
+// UserIDEQ applies the EQ predicate on the "user_id" field.
+func UserIDEQ(v int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldUserID, v))
+}
+
+// UserIDNEQ applies the NEQ predicate on the "user_id" field.
+func UserIDNEQ(v int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNEQ(FieldUserID, v))
+}
+
+// UserIDIn applies the In predicate on the "user_id" field.
+func UserIDIn(vs ...int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldIn(FieldUserID, vs...))
+}
+
+// UserIDNotIn applies the NotIn predicate on the "user_id" field.
+func UserIDNotIn(vs ...int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNotIn(FieldUserID, vs...))
+}
+
+// AttributeIDEQ applies the EQ predicate on the "attribute_id" field.
+func AttributeIDEQ(v int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldAttributeID, v))
+}
+
+// AttributeIDNEQ applies the NEQ predicate on the "attribute_id" field.
+func AttributeIDNEQ(v int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNEQ(FieldAttributeID, v))
+}
+
+// AttributeIDIn applies the In predicate on the "attribute_id" field.
+func AttributeIDIn(vs ...int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldIn(FieldAttributeID, vs...))
+}
+
+// AttributeIDNotIn applies the NotIn predicate on the "attribute_id" field.
+func AttributeIDNotIn(vs ...int64) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNotIn(FieldAttributeID, vs...))
+}
+
+// ValueEQ applies the EQ predicate on the "value" field.
+func ValueEQ(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEQ(FieldValue, v))
+}
+
+// ValueNEQ applies the NEQ predicate on the "value" field.
+func ValueNEQ(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNEQ(FieldValue, v))
+}
+
+// ValueIn applies the In predicate on the "value" field.
+func ValueIn(vs ...string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldIn(FieldValue, vs...))
+}
+
+// ValueNotIn applies the NotIn predicate on the "value" field.
+func ValueNotIn(vs ...string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldNotIn(FieldValue, vs...))
+}
+
+// ValueGT applies the GT predicate on the "value" field.
+func ValueGT(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldGT(FieldValue, v))
+}
+
+// ValueGTE applies the GTE predicate on the "value" field.
+func ValueGTE(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldGTE(FieldValue, v))
+}
+
+// ValueLT applies the LT predicate on the "value" field.
+func ValueLT(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldLT(FieldValue, v))
+}
+
+// ValueLTE applies the LTE predicate on the "value" field.
+func ValueLTE(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldLTE(FieldValue, v))
+}
+
+// ValueContains applies the Contains predicate on the "value" field.
+func ValueContains(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldContains(FieldValue, v))
+}
+
+// ValueHasPrefix applies the HasPrefix predicate on the "value" field.
+func ValueHasPrefix(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldHasPrefix(FieldValue, v))
+}
+
+// ValueHasSuffix applies the HasSuffix predicate on the "value" field.
+func ValueHasSuffix(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldHasSuffix(FieldValue, v))
+}
+
+// ValueEqualFold applies the EqualFold predicate on the "value" field.
+func ValueEqualFold(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldEqualFold(FieldValue, v))
+}
+
+// ValueContainsFold applies the ContainsFold predicate on the "value" field.
+func ValueContainsFold(v string) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.FieldContainsFold(FieldValue, v))
+}
+
+// HasUser applies the HasEdge predicate on the "user" edge.
+func HasUser() predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(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.UserAttributeValue {
+	return predicate.UserAttributeValue(func(s *sql.Selector) {
+		step := newUserStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// HasDefinition applies the HasEdge predicate on the "definition" edge.
+func HasDefinition() predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, DefinitionTable, DefinitionColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasDefinitionWith applies the HasEdge predicate on the "definition" edge with a given conditions (other predicates).
+func HasDefinitionWith(preds ...predicate.UserAttributeDefinition) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(func(s *sql.Selector) {
+		step := newDefinitionStep()
+		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.UserAttributeValue) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.UserAttributeValue) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.UserAttributeValue) predicate.UserAttributeValue {
+	return predicate.UserAttributeValue(sql.NotPredicates(p))
+}

backend/ent/userattributevalue_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/user"
+	"github.com/Wei-Shaw/sub2api/ent/userattributedefinition"
+	"github.com/Wei-Shaw/sub2api/ent/userattributevalue"
+)
+
+// UserAttributeValueCreate is the builder for creating a UserAttributeValue entity.
+type UserAttributeValueCreate struct {
+	config
+	mutation *UserAttributeValueMutation
+	hooks    []Hook
+	conflict []sql.ConflictOption
+}
+
+// SetCreatedAt sets the "created_at" field.
+func (_c *UserAttributeValueCreate) SetCreatedAt(v time.Time) *UserAttributeValueCreate {
+	_c.mutation.SetCreatedAt(v)
+	return _c
+}
+
+// SetNillableCreatedAt sets the "created_at" field if the given value is not nil.
+func (_c *UserAttributeValueCreate) SetNillableCreatedAt(v *time.Time) *UserAttributeValueCreate {
+	if v != nil {
+		_c.SetCreatedAt(*v)
+	}
+	return _c
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (_c *UserAttributeValueCreate) SetUpdatedAt(v time.Time) *UserAttributeValueCreate {
+	_c.mutation.SetUpdatedAt(v)
+	return _c
+}
+
+// SetNillableUpdatedAt sets the "updated_at" field if the given value is not nil.
+func (_c *UserAttributeValueCreate) SetNillableUpdatedAt(v *time.Time) *UserAttributeValueCreate {
+	if v != nil {
+		_c.SetUpdatedAt(*v)
+	}
+	return _c
+}
+
+// SetUserID sets the "user_id" field.
+func (_c *UserAttributeValueCreate) SetUserID(v int64) *UserAttributeValueCreate {
+	_c.mutation.SetUserID(v)
+	return _c
+}
+
+// SetAttributeID sets the "attribute_id" field.
+func (_c *UserAttributeValueCreate) SetAttributeID(v int64) *UserAttributeValueCreate {
+	_c.mutation.SetAttributeID(v)
+	return _c
+}
+
+// SetValue sets the "value" field.
+func (_c *UserAttributeValueCreate) SetValue(v string) *UserAttributeValueCreate {
+	_c.mutation.SetValue(v)
+	return _c
+}
+
+// SetNillableValue sets the "value" field if the given value is not nil.
+func (_c *UserAttributeValueCreate) SetNillableValue(v *string) *UserAttributeValueCreate {
+	if v != nil {
+		_c.SetValue(*v)
+	}
+	return _c
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_c *UserAttributeValueCreate) SetUser(v *User) *UserAttributeValueCreate {
+	return _c.SetUserID(v.ID)
+}
+
+// SetDefinitionID sets the "definition" edge to the UserAttributeDefinition entity by ID.
+func (_c *UserAttributeValueCreate) SetDefinitionID(id int64) *UserAttributeValueCreate {
+	_c.mutation.SetDefinitionID(id)
+	return _c
+}
+
+// SetDefinition sets the "definition" edge to the UserAttributeDefinition entity.
+func (_c *UserAttributeValueCreate) SetDefinition(v *UserAttributeDefinition) *UserAttributeValueCreate {
+	return _c.SetDefinitionID(v.ID)
+}
+
+// Mutation returns the UserAttributeValueMutation object of the builder.
+func (_c *UserAttributeValueCreate) Mutation() *UserAttributeValueMutation {
+	return _c.mutation
+}
+
+// Save creates the UserAttributeValue in the database.
+func (_c *UserAttributeValueCreate) Save(ctx context.Context) (*UserAttributeValue, error) {
+	_c.defaults()
+	return withHooks(ctx, _c.sqlSave, _c.mutation, _c.hooks)
+}
+
+// SaveX calls Save and panics if Save returns an error.
+func (_c *UserAttributeValueCreate) SaveX(ctx context.Context) *UserAttributeValue {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *UserAttributeValueCreate) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *UserAttributeValueCreate) 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 *UserAttributeValueCreate) defaults() {
+	if _, ok := _c.mutation.CreatedAt(); !ok {
+		v := userattributevalue.DefaultCreatedAt()
+		_c.mutation.SetCreatedAt(v)
+	}
+	if _, ok := _c.mutation.UpdatedAt(); !ok {
+		v := userattributevalue.DefaultUpdatedAt()
+		_c.mutation.SetUpdatedAt(v)
+	}
+	if _, ok := _c.mutation.Value(); !ok {
+		v := userattributevalue.DefaultValue
+		_c.mutation.SetValue(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_c *UserAttributeValueCreate) check() error {
+	if _, ok := _c.mutation.CreatedAt(); !ok {
+		return &ValidationError{Name: "created_at", err: errors.New(`ent: missing required field "UserAttributeValue.created_at"`)}
+	}
+	if _, ok := _c.mutation.UpdatedAt(); !ok {
+		return &ValidationError{Name: "updated_at", err: errors.New(`ent: missing required field "UserAttributeValue.updated_at"`)}
+	}
+	if _, ok := _c.mutation.UserID(); !ok {
+		return &ValidationError{Name: "user_id", err: errors.New(`ent: missing required field "UserAttributeValue.user_id"`)}
+	}
+	if _, ok := _c.mutation.AttributeID(); !ok {
+		return &ValidationError{Name: "attribute_id", err: errors.New(`ent: missing required field "UserAttributeValue.attribute_id"`)}
+	}
+	if _, ok := _c.mutation.Value(); !ok {
+		return &ValidationError{Name: "value", err: errors.New(`ent: missing required field "UserAttributeValue.value"`)}
+	}
+	if len(_c.mutation.UserIDs()) == 0 {
+		return &ValidationError{Name: "user", err: errors.New(`ent: missing required edge "UserAttributeValue.user"`)}
+	}
+	if len(_c.mutation.DefinitionIDs()) == 0 {
+		return &ValidationError{Name: "definition", err: errors.New(`ent: missing required edge "UserAttributeValue.definition"`)}
+	}
+	return nil
+}
+
+func (_c *UserAttributeValueCreate) sqlSave(ctx context.Context) (*UserAttributeValue, 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 *UserAttributeValueCreate) createSpec() (*UserAttributeValue, *sqlgraph.CreateSpec) {
+	var (
+		_node = &UserAttributeValue{config: _c.config}
+		_spec = sqlgraph.NewCreateSpec(userattributevalue.Table, sqlgraph.NewFieldSpec(userattributevalue.FieldID, field.TypeInt64))
+	)
+	_spec.OnConflict = _c.conflict
+	if value, ok := _c.mutation.CreatedAt(); ok {
+		_spec.SetField(userattributevalue.FieldCreatedAt, field.TypeTime, value)
+		_node.CreatedAt = value
+	}
+	if value, ok := _c.mutation.UpdatedAt(); ok {
+		_spec.SetField(userattributevalue.FieldUpdatedAt, field.TypeTime, value)
+		_node.UpdatedAt = value
+	}
+	if value, ok := _c.mutation.Value(); ok {
+		_spec.SetField(userattributevalue.FieldValue, field.TypeString, value)
+		_node.Value = value
+	}
+	if nodes := _c.mutation.UserIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   userattributevalue.UserTable,
+			Columns: []string{userattributevalue.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)
+	}
+	if nodes := _c.mutation.DefinitionIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   userattributevalue.DefinitionTable,
+			Columns: []string{userattributevalue.DefinitionColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(userattributedefinition.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_node.AttributeID = 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.UserAttributeValue.Create().
+//		SetCreatedAt(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.UserAttributeValueUpsert) {
+//			SetCreatedAt(v+v).
+//		}).
+//		Exec(ctx)
+func (_c *UserAttributeValueCreate) OnConflict(opts ...sql.ConflictOption) *UserAttributeValueUpsertOne {
+	_c.conflict = opts
+	return &UserAttributeValueUpsertOne{
+		create: _c,
+	}
+}
+
+// OnConflictColumns calls `OnConflict` and configures the columns
+// as conflict target. Using this option is equivalent to using:
+//
+//	client.UserAttributeValue.Create().
+//		OnConflict(sql.ConflictColumns(columns...)).
+//		Exec(ctx)
+func (_c *UserAttributeValueCreate) OnConflictColumns(columns ...string) *UserAttributeValueUpsertOne {
+	_c.conflict = append(_c.conflict, sql.ConflictColumns(columns...))
+	return &UserAttributeValueUpsertOne{
+		create: _c,
+	}
+}
+
+type (
+	// UserAttributeValueUpsertOne is the builder for "upsert"-ing
+	//  one UserAttributeValue node.
+	UserAttributeValueUpsertOne struct {
+		create *UserAttributeValueCreate
+	}
+
+	// UserAttributeValueUpsert is the "OnConflict" setter.
+	UserAttributeValueUpsert struct {
+		*sql.UpdateSet
+	}
+)
+
+// SetUpdatedAt sets the "updated_at" field.
+func (u *UserAttributeValueUpsert) SetUpdatedAt(v time.Time) *UserAttributeValueUpsert {
+	u.Set(userattributevalue.FieldUpdatedAt, v)
+	return u
+}
+
+// UpdateUpdatedAt sets the "updated_at" field to the value that was provided on create.
+func (u *UserAttributeValueUpsert) UpdateUpdatedAt() *UserAttributeValueUpsert {
+	u.SetExcluded(userattributevalue.FieldUpdatedAt)
+	return u
+}
+
+// SetUserID sets the "user_id" field.
+func (u *UserAttributeValueUpsert) SetUserID(v int64) *UserAttributeValueUpsert {
+	u.Set(userattributevalue.FieldUserID, v)
+	return u
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *UserAttributeValueUpsert) UpdateUserID() *UserAttributeValueUpsert {
+	u.SetExcluded(userattributevalue.FieldUserID)
+	return u
+}
+
+// SetAttributeID sets the "attribute_id" field.
+func (u *UserAttributeValueUpsert) SetAttributeID(v int64) *UserAttributeValueUpsert {
+	u.Set(userattributevalue.FieldAttributeID, v)
+	return u
+}
+
+// UpdateAttributeID sets the "attribute_id" field to the value that was provided on create.
+func (u *UserAttributeValueUpsert) UpdateAttributeID() *UserAttributeValueUpsert {
+	u.SetExcluded(userattributevalue.FieldAttributeID)
+	return u
+}
+
+// SetValue sets the "value" field.
+func (u *UserAttributeValueUpsert) SetValue(v string) *UserAttributeValueUpsert {
+	u.Set(userattributevalue.FieldValue, v)
+	return u
+}
+
+// UpdateValue sets the "value" field to the value that was provided on create.
+func (u *UserAttributeValueUpsert) UpdateValue() *UserAttributeValueUpsert {
+	u.SetExcluded(userattributevalue.FieldValue)
+	return u
+}
+
+// UpdateNewValues updates the mutable fields using the new values that were set on create.
+// Using this option is equivalent to using:
+//
+//	client.UserAttributeValue.Create().
+//		OnConflict(
+//			sql.ResolveWithNewValues(),
+//		).
+//		Exec(ctx)
+func (u *UserAttributeValueUpsertOne) UpdateNewValues() *UserAttributeValueUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithNewValues())
+	u.create.conflict = append(u.create.conflict, sql.ResolveWith(func(s *sql.UpdateSet) {
+		if _, exists := u.create.mutation.CreatedAt(); exists {
+			s.SetIgnore(userattributevalue.FieldCreatedAt)
+		}
+	}))
+	return u
+}
+
+// Ignore sets each column to itself in case of conflict.
+// Using this option is equivalent to using:
+//
+//	client.UserAttributeValue.Create().
+//	    OnConflict(sql.ResolveWithIgnore()).
+//	    Exec(ctx)
+func (u *UserAttributeValueUpsertOne) Ignore() *UserAttributeValueUpsertOne {
+	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 *UserAttributeValueUpsertOne) DoNothing() *UserAttributeValueUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.DoNothing())
+	return u
+}
+
+// Update allows overriding fields `UPDATE` values. See the UserAttributeValueCreate.OnConflict
+// documentation for more info.
+func (u *UserAttributeValueUpsertOne) Update(set func(*UserAttributeValueUpsert)) *UserAttributeValueUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWith(func(update *sql.UpdateSet) {
+		set(&UserAttributeValueUpsert{UpdateSet: update})
+	}))
+	return u
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (u *UserAttributeValueUpsertOne) SetUpdatedAt(v time.Time) *UserAttributeValueUpsertOne {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.SetUpdatedAt(v)
+	})
+}
+
+// UpdateUpdatedAt sets the "updated_at" field to the value that was provided on create.
+func (u *UserAttributeValueUpsertOne) UpdateUpdatedAt() *UserAttributeValueUpsertOne {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.UpdateUpdatedAt()
+	})
+}
+
+// SetUserID sets the "user_id" field.
+func (u *UserAttributeValueUpsertOne) SetUserID(v int64) *UserAttributeValueUpsertOne {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.SetUserID(v)
+	})
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *UserAttributeValueUpsertOne) UpdateUserID() *UserAttributeValueUpsertOne {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.UpdateUserID()
+	})
+}
+
+// SetAttributeID sets the "attribute_id" field.
+func (u *UserAttributeValueUpsertOne) SetAttributeID(v int64) *UserAttributeValueUpsertOne {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.SetAttributeID(v)
+	})
+}
+
+// UpdateAttributeID sets the "attribute_id" field to the value that was provided on create.
+func (u *UserAttributeValueUpsertOne) UpdateAttributeID() *UserAttributeValueUpsertOne {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.UpdateAttributeID()
+	})
+}
+
+// SetValue sets the "value" field.
+func (u *UserAttributeValueUpsertOne) SetValue(v string) *UserAttributeValueUpsertOne {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.SetValue(v)
+	})
+}
+
+// UpdateValue sets the "value" field to the value that was provided on create.
+func (u *UserAttributeValueUpsertOne) UpdateValue() *UserAttributeValueUpsertOne {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.UpdateValue()
+	})
+}
+
+// Exec executes the query.
+func (u *UserAttributeValueUpsertOne) Exec(ctx context.Context) error {
+	if len(u.create.conflict) == 0 {
+		return errors.New("ent: missing options for UserAttributeValueCreate.OnConflict")
+	}
+	return u.create.Exec(ctx)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (u *UserAttributeValueUpsertOne) 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 *UserAttributeValueUpsertOne) 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 *UserAttributeValueUpsertOne) IDX(ctx context.Context) int64 {
+	id, err := u.ID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// UserAttributeValueCreateBulk is the builder for creating many UserAttributeValue entities in bulk.
+type UserAttributeValueCreateBulk struct {
+	config
+	err      error
+	builders []*UserAttributeValueCreate
+	conflict []sql.ConflictOption
+}
+
+// Save creates the UserAttributeValue entities in the database.
+func (_c *UserAttributeValueCreateBulk) Save(ctx context.Context) ([]*UserAttributeValue, error) {
+	if _c.err != nil {
+		return nil, _c.err
+	}
+	specs := make([]*sqlgraph.CreateSpec, len(_c.builders))
+	nodes := make([]*UserAttributeValue, 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.(*UserAttributeValueMutation)
+				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 *UserAttributeValueCreateBulk) SaveX(ctx context.Context) []*UserAttributeValue {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *UserAttributeValueCreateBulk) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *UserAttributeValueCreateBulk) 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.UserAttributeValue.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.UserAttributeValueUpsert) {
+//			SetCreatedAt(v+v).
+//		}).
+//		Exec(ctx)
+func (_c *UserAttributeValueCreateBulk) OnConflict(opts ...sql.ConflictOption) *UserAttributeValueUpsertBulk {
+	_c.conflict = opts
+	return &UserAttributeValueUpsertBulk{
+		create: _c,
+	}
+}
+
+// OnConflictColumns calls `OnConflict` and configures the columns
+// as conflict target. Using this option is equivalent to using:
+//
+//	client.UserAttributeValue.Create().
+//		OnConflict(sql.ConflictColumns(columns...)).
+//		Exec(ctx)
+func (_c *UserAttributeValueCreateBulk) OnConflictColumns(columns ...string) *UserAttributeValueUpsertBulk {
+	_c.conflict = append(_c.conflict, sql.ConflictColumns(columns...))
+	return &UserAttributeValueUpsertBulk{
+		create: _c,
+	}
+}
+
+// UserAttributeValueUpsertBulk is the builder for "upsert"-ing
+// a bulk of UserAttributeValue nodes.
+type UserAttributeValueUpsertBulk struct {
+	create *UserAttributeValueCreateBulk
+}
+
+// UpdateNewValues updates the mutable fields using the new values that
+// were set on create. Using this option is equivalent to using:
+//
+//	client.UserAttributeValue.Create().
+//		OnConflict(
+//			sql.ResolveWithNewValues(),
+//		).
+//		Exec(ctx)
+func (u *UserAttributeValueUpsertBulk) UpdateNewValues() *UserAttributeValueUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithNewValues())
+	u.create.conflict = append(u.create.conflict, sql.ResolveWith(func(s *sql.UpdateSet) {
+		for _, b := range u.create.builders {
+			if _, exists := b.mutation.CreatedAt(); exists {
+				s.SetIgnore(userattributevalue.FieldCreatedAt)
+			}
+		}
+	}))
+	return u
+}
+
+// Ignore sets each column to itself in case of conflict.
+// Using this option is equivalent to using:
+//
+//	client.UserAttributeValue.Create().
+//		OnConflict(sql.ResolveWithIgnore()).
+//		Exec(ctx)
+func (u *UserAttributeValueUpsertBulk) Ignore() *UserAttributeValueUpsertBulk {
+	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 *UserAttributeValueUpsertBulk) DoNothing() *UserAttributeValueUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.DoNothing())
+	return u
+}
+
+// Update allows overriding fields `UPDATE` values. See the UserAttributeValueCreateBulk.OnConflict
+// documentation for more info.
+func (u *UserAttributeValueUpsertBulk) Update(set func(*UserAttributeValueUpsert)) *UserAttributeValueUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWith(func(update *sql.UpdateSet) {
+		set(&UserAttributeValueUpsert{UpdateSet: update})
+	}))
+	return u
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (u *UserAttributeValueUpsertBulk) SetUpdatedAt(v time.Time) *UserAttributeValueUpsertBulk {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.SetUpdatedAt(v)
+	})
+}
+
+// UpdateUpdatedAt sets the "updated_at" field to the value that was provided on create.
+func (u *UserAttributeValueUpsertBulk) UpdateUpdatedAt() *UserAttributeValueUpsertBulk {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.UpdateUpdatedAt()
+	})
+}
+
+// SetUserID sets the "user_id" field.
+func (u *UserAttributeValueUpsertBulk) SetUserID(v int64) *UserAttributeValueUpsertBulk {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.SetUserID(v)
+	})
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *UserAttributeValueUpsertBulk) UpdateUserID() *UserAttributeValueUpsertBulk {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.UpdateUserID()
+	})
+}
+
+// SetAttributeID sets the "attribute_id" field.
+func (u *UserAttributeValueUpsertBulk) SetAttributeID(v int64) *UserAttributeValueUpsertBulk {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.SetAttributeID(v)
+	})
+}
+
+// UpdateAttributeID sets the "attribute_id" field to the value that was provided on create.
+func (u *UserAttributeValueUpsertBulk) UpdateAttributeID() *UserAttributeValueUpsertBulk {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.UpdateAttributeID()
+	})
+}
+
+// SetValue sets the "value" field.
+func (u *UserAttributeValueUpsertBulk) SetValue(v string) *UserAttributeValueUpsertBulk {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.SetValue(v)
+	})
+}
+
+// UpdateValue sets the "value" field to the value that was provided on create.
+func (u *UserAttributeValueUpsertBulk) UpdateValue() *UserAttributeValueUpsertBulk {
+	return u.Update(func(s *UserAttributeValueUpsert) {
+		s.UpdateValue()
+	})
+}
+
+// Exec executes the query.
+func (u *UserAttributeValueUpsertBulk) 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 UserAttributeValueCreateBulk instead", i)
+		}
+	}
+	if len(u.create.conflict) == 0 {
+		return errors.New("ent: missing options for UserAttributeValueCreateBulk.OnConflict")
+	}
+	return u.create.Exec(ctx)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (u *UserAttributeValueUpsertBulk) ExecX(ctx context.Context) {
+	if err := u.create.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

backend/ent/userattributevalue_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/userattributevalue"
+)
+
+// UserAttributeValueDelete is the builder for deleting a UserAttributeValue entity.
+type UserAttributeValueDelete struct {
+	config
+	hooks    []Hook
+	mutation *UserAttributeValueMutation
+}
+
+// Where appends a list predicates to the UserAttributeValueDelete builder.
+func (_d *UserAttributeValueDelete) Where(ps ...predicate.UserAttributeValue) *UserAttributeValueDelete {
+	_d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query and returns how many vertices were deleted.
+func (_d *UserAttributeValueDelete) 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 *UserAttributeValueDelete) ExecX(ctx context.Context) int {
+	n, err := _d.Exec(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+func (_d *UserAttributeValueDelete) sqlExec(ctx context.Context) (int, error) {
+	_spec := sqlgraph.NewDeleteSpec(userattributevalue.Table, sqlgraph.NewFieldSpec(userattributevalue.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
+}
+
+// UserAttributeValueDeleteOne is the builder for deleting a single UserAttributeValue entity.
+type UserAttributeValueDeleteOne struct {
+	_d *UserAttributeValueDelete
+}
+
+// Where appends a list predicates to the UserAttributeValueDelete builder.
+func (_d *UserAttributeValueDeleteOne) Where(ps ...predicate.UserAttributeValue) *UserAttributeValueDeleteOne {
+	_d._d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query.
+func (_d *UserAttributeValueDeleteOne) Exec(ctx context.Context) error {
+	n, err := _d._d.Exec(ctx)
+	switch {
+	case err != nil:
+		return err
+	case n == 0:
+		return &NotFoundError{userattributevalue.Label}
+	default:
+		return nil
+	}
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *UserAttributeValueDeleteOne) ExecX(ctx context.Context) {
+	if err := _d.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

backend/ent/userattributevalue_query.go

+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"fmt"
+	"math"
+
+	"entgo.io/ent"
+	"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/user"
+	"github.com/Wei-Shaw/sub2api/ent/userattributedefinition"
+	"github.com/Wei-Shaw/sub2api/ent/userattributevalue"
+)
+
+// UserAttributeValueQuery is the builder for querying UserAttributeValue entities.
+type UserAttributeValueQuery struct {
+	config
+	ctx            *QueryContext
+	order          []userattributevalue.OrderOption
+	inters         []Interceptor
+	predicates     []predicate.UserAttributeValue
+	withUser       *UserQuery
+	withDefinition *UserAttributeDefinitionQuery
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the UserAttributeValueQuery builder.
+func (_q *UserAttributeValueQuery) Where(ps ...predicate.UserAttributeValue) *UserAttributeValueQuery {
+	_q.predicates = append(_q.predicates, ps...)
+	return _q
+}
+
+// Limit the number of records to be returned by this query.
+func (_q *UserAttributeValueQuery) Limit(limit int) *UserAttributeValueQuery {
+	_q.ctx.Limit = &limit
+	return _q
+}
+
+// Offset to start from.
+func (_q *UserAttributeValueQuery) Offset(offset int) *UserAttributeValueQuery {
+	_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 *UserAttributeValueQuery) Unique(unique bool) *UserAttributeValueQuery {
+	_q.ctx.Unique = &unique
+	return _q
+}
+
+// Order specifies how the records should be ordered.
+func (_q *UserAttributeValueQuery) Order(o ...userattributevalue.OrderOption) *UserAttributeValueQuery {
+	_q.order = append(_q.order, o...)
+	return _q
+}
+
+// QueryUser chains the current query on the "user" edge.
+func (_q *UserAttributeValueQuery) 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(userattributevalue.Table, userattributevalue.FieldID, selector),
+			sqlgraph.To(user.Table, user.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, userattributevalue.UserTable, userattributevalue.UserColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// QueryDefinition chains the current query on the "definition" edge.
+func (_q *UserAttributeValueQuery) QueryDefinition() *UserAttributeDefinitionQuery {
+	query := (&UserAttributeDefinitionClient{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(userattributevalue.Table, userattributevalue.FieldID, selector),
+			sqlgraph.To(userattributedefinition.Table, userattributedefinition.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, userattributevalue.DefinitionTable, userattributevalue.DefinitionColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first UserAttributeValue entity from the query.
+// Returns a *NotFoundError when no UserAttributeValue was found.
+func (_q *UserAttributeValueQuery) First(ctx context.Context) (*UserAttributeValue, 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{userattributevalue.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (_q *UserAttributeValueQuery) FirstX(ctx context.Context) *UserAttributeValue {
+	node, err := _q.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first UserAttributeValue ID from the query.
+// Returns a *NotFoundError when no UserAttributeValue ID was found.
+func (_q *UserAttributeValueQuery) 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{userattributevalue.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (_q *UserAttributeValueQuery) FirstIDX(ctx context.Context) int64 {
+	id, err := _q.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single UserAttributeValue entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one UserAttributeValue entity is found.
+// Returns a *NotFoundError when no UserAttributeValue entities are found.
+func (_q *UserAttributeValueQuery) Only(ctx context.Context) (*UserAttributeValue, 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{userattributevalue.Label}
+	default:
+		return nil, &NotSingularError{userattributevalue.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (_q *UserAttributeValueQuery) OnlyX(ctx context.Context) *UserAttributeValue {
+	node, err := _q.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only UserAttributeValue ID in the query.
+// Returns a *NotSingularError when more than one UserAttributeValue ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (_q *UserAttributeValueQuery) 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{userattributevalue.Label}
+	default:
+		err = &NotSingularError{userattributevalue.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (_q *UserAttributeValueQuery) 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 UserAttributeValues.
+func (_q *UserAttributeValueQuery) All(ctx context.Context) ([]*UserAttributeValue, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryAll)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	qr := querierAll[[]*UserAttributeValue, *UserAttributeValueQuery]()
+	return withInterceptors[[]*UserAttributeValue](ctx, _q, qr, _q.inters)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (_q *UserAttributeValueQuery) AllX(ctx context.Context) []*UserAttributeValue {
+	nodes, err := _q.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of UserAttributeValue IDs.
+func (_q *UserAttributeValueQuery) 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(userattributevalue.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (_q *UserAttributeValueQuery) 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 *UserAttributeValueQuery) 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[*UserAttributeValueQuery](), _q.inters)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (_q *UserAttributeValueQuery) 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 *UserAttributeValueQuery) 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 *UserAttributeValueQuery) ExistX(ctx context.Context) bool {
+	exist, err := _q.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the UserAttributeValueQuery 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 *UserAttributeValueQuery) Clone() *UserAttributeValueQuery {
+	if _q == nil {
+		return nil
+	}
+	return &UserAttributeValueQuery{
+		config:         _q.config,
+		ctx:            _q.ctx.Clone(),
+		order:          append([]userattributevalue.OrderOption{}, _q.order...),
+		inters:         append([]Interceptor{}, _q.inters...),
+		predicates:     append([]predicate.UserAttributeValue{}, _q.predicates...),
+		withUser:       _q.withUser.Clone(),
+		withDefinition: _q.withDefinition.Clone(),
+		// clone intermediate query.
+		sql:  _q.sql.Clone(),
+		path: _q.path,
+	}
+}
+
+// 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 *UserAttributeValueQuery) WithUser(opts ...func(*UserQuery)) *UserAttributeValueQuery {
+	query := (&UserClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withUser = query
+	return _q
+}
+
+// WithDefinition tells the query-builder to eager-load the nodes that are connected to
+// the "definition" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *UserAttributeValueQuery) WithDefinition(opts ...func(*UserAttributeDefinitionQuery)) *UserAttributeValueQuery {
+	query := (&UserAttributeDefinitionClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withDefinition = 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 {
+//		CreatedAt time.Time `json:"created_at,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.UserAttributeValue.Query().
+//		GroupBy(userattributevalue.FieldCreatedAt).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (_q *UserAttributeValueQuery) GroupBy(field string, fields ...string) *UserAttributeValueGroupBy {
+	_q.ctx.Fields = append([]string{field}, fields...)
+	grbuild := &UserAttributeValueGroupBy{build: _q}
+	grbuild.flds = &_q.ctx.Fields
+	grbuild.label = userattributevalue.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 {
+//		CreatedAt time.Time `json:"created_at,omitempty"`
+//	}
+//
+//	client.UserAttributeValue.Query().
+//		Select(userattributevalue.FieldCreatedAt).
+//		Scan(ctx, &v)
+func (_q *UserAttributeValueQuery) Select(fields ...string) *UserAttributeValueSelect {
+	_q.ctx.Fields = append(_q.ctx.Fields, fields...)
+	sbuild := &UserAttributeValueSelect{UserAttributeValueQuery: _q}
+	sbuild.label = userattributevalue.Label
+	sbuild.flds, sbuild.scan = &_q.ctx.Fields, sbuild.Scan
+	return sbuild
+}
+
+// Aggregate returns a UserAttributeValueSelect configured with the given aggregations.
+func (_q *UserAttributeValueQuery) Aggregate(fns ...AggregateFunc) *UserAttributeValueSelect {
+	return _q.Select().Aggregate(fns...)
+}
+
+func (_q *UserAttributeValueQuery) 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 !userattributevalue.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 *UserAttributeValueQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*UserAttributeValue, error) {
+	var (
+		nodes       = []*UserAttributeValue{}
+		_spec       = _q.querySpec()
+		loadedTypes = [2]bool{
+			_q.withUser != nil,
+			_q.withDefinition != nil,
+		}
+	)
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*UserAttributeValue).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &UserAttributeValue{config: _q.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	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.withUser; query != nil {
+		if err := _q.loadUser(ctx, query, nodes, nil,
+			func(n *UserAttributeValue, e *User) { n.Edges.User = e }); err != nil {
+			return nil, err
+		}
+	}
+	if query := _q.withDefinition; query != nil {
+		if err := _q.loadDefinition(ctx, query, nodes, nil,
+			func(n *UserAttributeValue, e *UserAttributeDefinition) { n.Edges.Definition = e }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (_q *UserAttributeValueQuery) loadUser(ctx context.Context, query *UserQuery, nodes []*UserAttributeValue, init func(*UserAttributeValue), assign func(*UserAttributeValue, *User)) error {
+	ids := make([]int64, 0, len(nodes))
+	nodeids := make(map[int64][]*UserAttributeValue)
+	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 *UserAttributeValueQuery) loadDefinition(ctx context.Context, query *UserAttributeDefinitionQuery, nodes []*UserAttributeValue, init func(*UserAttributeValue), assign func(*UserAttributeValue, *UserAttributeDefinition)) error {
+	ids := make([]int64, 0, len(nodes))
+	nodeids := make(map[int64][]*UserAttributeValue)
+	for i := range nodes {
+		fk := nodes[i].AttributeID
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	if len(ids) == 0 {
+		return nil
+	}
+	query.Where(userattributedefinition.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 "attribute_id" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+
+func (_q *UserAttributeValueQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := _q.querySpec()
+	_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 *UserAttributeValueQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := sqlgraph.NewQuerySpec(userattributevalue.Table, userattributevalue.Columns, sqlgraph.NewFieldSpec(userattributevalue.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, userattributevalue.FieldID)
+		for i := range fields {
+			if fields[i] != userattributevalue.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+		if _q.withUser != nil {
+			_spec.Node.AddColumnOnce(userattributevalue.FieldUserID)
+		}
+		if _q.withDefinition != nil {
+			_spec.Node.AddColumnOnce(userattributevalue.FieldAttributeID)
+		}
+	}
+	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 *UserAttributeValueQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(_q.driver.Dialect())
+	t1 := builder.Table(userattributevalue.Table)
+	columns := _q.ctx.Fields
+	if len(columns) == 0 {
+		columns = userattributevalue.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 _, 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
+}
+
+// UserAttributeValueGroupBy is the group-by builder for UserAttributeValue entities.
+type UserAttributeValueGroupBy struct {
+	selector
+	build *UserAttributeValueQuery
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (_g *UserAttributeValueGroupBy) Aggregate(fns ...AggregateFunc) *UserAttributeValueGroupBy {
+	_g.fns = append(_g.fns, fns...)
+	return _g
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_g *UserAttributeValueGroupBy) 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[*UserAttributeValueQuery, *UserAttributeValueGroupBy](ctx, _g.build, _g, _g.build.inters, v)
+}
+
+func (_g *UserAttributeValueGroupBy) sqlScan(ctx context.Context, root *UserAttributeValueQuery, 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)
+}
+
+// UserAttributeValueSelect is the builder for selecting fields of UserAttributeValue entities.
+type UserAttributeValueSelect struct {
+	*UserAttributeValueQuery
+	selector
+}
+
+// Aggregate adds the given aggregation functions to the selector query.
+func (_s *UserAttributeValueSelect) Aggregate(fns ...AggregateFunc) *UserAttributeValueSelect {
+	_s.fns = append(_s.fns, fns...)
+	return _s
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_s *UserAttributeValueSelect) 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[*UserAttributeValueQuery, *UserAttributeValueSelect](ctx, _s.UserAttributeValueQuery, _s, _s.inters, v)
+}
+
+func (_s *UserAttributeValueSelect) sqlScan(ctx context.Context, root *UserAttributeValueQuery, 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/userattributevalue_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/user"
+	"github.com/Wei-Shaw/sub2api/ent/userattributedefinition"
+	"github.com/Wei-Shaw/sub2api/ent/userattributevalue"
+)
+
+// UserAttributeValueUpdate is the builder for updating UserAttributeValue entities.
+type UserAttributeValueUpdate struct {
+	config
+	hooks    []Hook
+	mutation *UserAttributeValueMutation
+}
+
+// Where appends a list predicates to the UserAttributeValueUpdate builder.
+func (_u *UserAttributeValueUpdate) Where(ps ...predicate.UserAttributeValue) *UserAttributeValueUpdate {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (_u *UserAttributeValueUpdate) SetUpdatedAt(v time.Time) *UserAttributeValueUpdate {
+	_u.mutation.SetUpdatedAt(v)
+	return _u
+}
+
+// SetUserID sets the "user_id" field.
+func (_u *UserAttributeValueUpdate) SetUserID(v int64) *UserAttributeValueUpdate {
+	_u.mutation.SetUserID(v)
+	return _u
+}
+
+// SetNillableUserID sets the "user_id" field if the given value is not nil.
+func (_u *UserAttributeValueUpdate) SetNillableUserID(v *int64) *UserAttributeValueUpdate {
+	if v != nil {
+		_u.SetUserID(*v)
+	}
+	return _u
+}
+
+// SetAttributeID sets the "attribute_id" field.
+func (_u *UserAttributeValueUpdate) SetAttributeID(v int64) *UserAttributeValueUpdate {
+	_u.mutation.SetAttributeID(v)
+	return _u
+}
+
+// SetNillableAttributeID sets the "attribute_id" field if the given value is not nil.
+func (_u *UserAttributeValueUpdate) SetNillableAttributeID(v *int64) *UserAttributeValueUpdate {
+	if v != nil {
+		_u.SetAttributeID(*v)
+	}
+	return _u
+}
+
+// SetValue sets the "value" field.
+func (_u *UserAttributeValueUpdate) SetValue(v string) *UserAttributeValueUpdate {
+	_u.mutation.SetValue(v)
+	return _u
+}
+
+// SetNillableValue sets the "value" field if the given value is not nil.
+func (_u *UserAttributeValueUpdate) SetNillableValue(v *string) *UserAttributeValueUpdate {
+	if v != nil {
+		_u.SetValue(*v)
+	}
+	return _u
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_u *UserAttributeValueUpdate) SetUser(v *User) *UserAttributeValueUpdate {
+	return _u.SetUserID(v.ID)
+}
+
+// SetDefinitionID sets the "definition" edge to the UserAttributeDefinition entity by ID.
+func (_u *UserAttributeValueUpdate) SetDefinitionID(id int64) *UserAttributeValueUpdate {
+	_u.mutation.SetDefinitionID(id)
+	return _u
+}
+
+// SetDefinition sets the "definition" edge to the UserAttributeDefinition entity.
+func (_u *UserAttributeValueUpdate) SetDefinition(v *UserAttributeDefinition) *UserAttributeValueUpdate {
+	return _u.SetDefinitionID(v.ID)
+}
+
+// Mutation returns the UserAttributeValueMutation object of the builder.
+func (_u *UserAttributeValueUpdate) Mutation() *UserAttributeValueMutation {
+	return _u.mutation
+}
+
+// ClearUser clears the "user" edge to the User entity.
+func (_u *UserAttributeValueUpdate) ClearUser() *UserAttributeValueUpdate {
+	_u.mutation.ClearUser()
+	return _u
+}
+
+// ClearDefinition clears the "definition" edge to the UserAttributeDefinition entity.
+func (_u *UserAttributeValueUpdate) ClearDefinition() *UserAttributeValueUpdate {
+	_u.mutation.ClearDefinition()
+	return _u
+}
+
+// Save executes the query and returns the number of nodes affected by the update operation.
+func (_u *UserAttributeValueUpdate) 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 *UserAttributeValueUpdate) SaveX(ctx context.Context) int {
+	affected, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return affected
+}
+
+// Exec executes the query.
+func (_u *UserAttributeValueUpdate) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *UserAttributeValueUpdate) 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 *UserAttributeValueUpdate) defaults() {
+	if _, ok := _u.mutation.UpdatedAt(); !ok {
+		v := userattributevalue.UpdateDefaultUpdatedAt()
+		_u.mutation.SetUpdatedAt(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *UserAttributeValueUpdate) check() error {
+	if _u.mutation.UserCleared() && len(_u.mutation.UserIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "UserAttributeValue.user"`)
+	}
+	if _u.mutation.DefinitionCleared() && len(_u.mutation.DefinitionIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "UserAttributeValue.definition"`)
+	}
+	return nil
+}
+
+func (_u *UserAttributeValueUpdate) sqlSave(ctx context.Context) (_node int, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(userattributevalue.Table, userattributevalue.Columns, sqlgraph.NewFieldSpec(userattributevalue.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.UpdatedAt(); ok {
+		_spec.SetField(userattributevalue.FieldUpdatedAt, field.TypeTime, value)
+	}
+	if value, ok := _u.mutation.Value(); ok {
+		_spec.SetField(userattributevalue.FieldValue, field.TypeString, value)
+	}
+	if _u.mutation.UserCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   userattributevalue.UserTable,
+			Columns: []string{userattributevalue.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:   userattributevalue.UserTable,
+			Columns: []string{userattributevalue.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 _u.mutation.DefinitionCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   userattributevalue.DefinitionTable,
+			Columns: []string{userattributevalue.DefinitionColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(userattributedefinition.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.DefinitionIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   userattributevalue.DefinitionTable,
+			Columns: []string{userattributevalue.DefinitionColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(userattributedefinition.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{userattributevalue.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return 0, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}
+
+// UserAttributeValueUpdateOne is the builder for updating a single UserAttributeValue entity.
+type UserAttributeValueUpdateOne struct {
+	config
+	fields   []string
+	hooks    []Hook
+	mutation *UserAttributeValueMutation
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (_u *UserAttributeValueUpdateOne) SetUpdatedAt(v time.Time) *UserAttributeValueUpdateOne {
+	_u.mutation.SetUpdatedAt(v)
+	return _u
+}
+
+// SetUserID sets the "user_id" field.
+func (_u *UserAttributeValueUpdateOne) SetUserID(v int64) *UserAttributeValueUpdateOne {
+	_u.mutation.SetUserID(v)
+	return _u
+}
+
+// SetNillableUserID sets the "user_id" field if the given value is not nil.
+func (_u *UserAttributeValueUpdateOne) SetNillableUserID(v *int64) *UserAttributeValueUpdateOne {
+	if v != nil {
+		_u.SetUserID(*v)
+	}
+	return _u
+}
+
+// SetAttributeID sets the "attribute_id" field.
+func (_u *UserAttributeValueUpdateOne) SetAttributeID(v int64) *UserAttributeValueUpdateOne {
+	_u.mutation.SetAttributeID(v)
+	return _u
+}
+
+// SetNillableAttributeID sets the "attribute_id" field if the given value is not nil.
+func (_u *UserAttributeValueUpdateOne) SetNillableAttributeID(v *int64) *UserAttributeValueUpdateOne {
+	if v != nil {
+		_u.SetAttributeID(*v)
+	}
+	return _u
+}
+
+// SetValue sets the "value" field.
+func (_u *UserAttributeValueUpdateOne) SetValue(v string) *UserAttributeValueUpdateOne {
+	_u.mutation.SetValue(v)
+	return _u
+}
+
+// SetNillableValue sets the "value" field if the given value is not nil.
+func (_u *UserAttributeValueUpdateOne) SetNillableValue(v *string) *UserAttributeValueUpdateOne {
+	if v != nil {
+		_u.SetValue(*v)
+	}
+	return _u
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_u *UserAttributeValueUpdateOne) SetUser(v *User) *UserAttributeValueUpdateOne {
+	return _u.SetUserID(v.ID)
+}
+
+// SetDefinitionID sets the "definition" edge to the UserAttributeDefinition entity by ID.
+func (_u *UserAttributeValueUpdateOne) SetDefinitionID(id int64) *UserAttributeValueUpdateOne {
+	_u.mutation.SetDefinitionID(id)
+	return _u
+}
+
+// SetDefinition sets the "definition" edge to the UserAttributeDefinition entity.
+func (_u *UserAttributeValueUpdateOne) SetDefinition(v *UserAttributeDefinition) *UserAttributeValueUpdateOne {
+	return _u.SetDefinitionID(v.ID)
+}
+
+// Mutation returns the UserAttributeValueMutation object of the builder.
+func (_u *UserAttributeValueUpdateOne) Mutation() *UserAttributeValueMutation {
+	return _u.mutation
+}
+
+// ClearUser clears the "user" edge to the User entity.
+func (_u *UserAttributeValueUpdateOne) ClearUser() *UserAttributeValueUpdateOne {
+	_u.mutation.ClearUser()
+	return _u
+}
+
+// ClearDefinition clears the "definition" edge to the UserAttributeDefinition entity.
+func (_u *UserAttributeValueUpdateOne) ClearDefinition() *UserAttributeValueUpdateOne {
+	_u.mutation.ClearDefinition()
+	return _u
+}
+
+// Where appends a list predicates to the UserAttributeValueUpdate builder.
+func (_u *UserAttributeValueUpdateOne) Where(ps ...predicate.UserAttributeValue) *UserAttributeValueUpdateOne {
+	_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 *UserAttributeValueUpdateOne) Select(field string, fields ...string) *UserAttributeValueUpdateOne {
+	_u.fields = append([]string{field}, fields...)
+	return _u
+}
+
+// Save executes the query and returns the updated UserAttributeValue entity.
+func (_u *UserAttributeValueUpdateOne) Save(ctx context.Context) (*UserAttributeValue, error) {
+	_u.defaults()
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *UserAttributeValueUpdateOne) SaveX(ctx context.Context) *UserAttributeValue {
+	node, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// Exec executes the query on the entity.
+func (_u *UserAttributeValueUpdateOne) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *UserAttributeValueUpdateOne) 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 *UserAttributeValueUpdateOne) defaults() {
+	if _, ok := _u.mutation.UpdatedAt(); !ok {
+		v := userattributevalue.UpdateDefaultUpdatedAt()
+		_u.mutation.SetUpdatedAt(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *UserAttributeValueUpdateOne) check() error {
+	if _u.mutation.UserCleared() && len(_u.mutation.UserIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "UserAttributeValue.user"`)
+	}
+	if _u.mutation.DefinitionCleared() && len(_u.mutation.DefinitionIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "UserAttributeValue.definition"`)
+	}
+	return nil
+}
+
+func (_u *UserAttributeValueUpdateOne) sqlSave(ctx context.Context) (_node *UserAttributeValue, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(userattributevalue.Table, userattributevalue.Columns, sqlgraph.NewFieldSpec(userattributevalue.FieldID, field.TypeInt64))
+	id, ok := _u.mutation.ID()
+	if !ok {
+		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "UserAttributeValue.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, userattributevalue.FieldID)
+		for _, f := range fields {
+			if !userattributevalue.ValidColumn(f) {
+				return nil, &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+			}
+			if f != userattributevalue.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.UpdatedAt(); ok {
+		_spec.SetField(userattributevalue.FieldUpdatedAt, field.TypeTime, value)
+	}
+	if value, ok := _u.mutation.Value(); ok {
+		_spec.SetField(userattributevalue.FieldValue, field.TypeString, value)
+	}
+	if _u.mutation.UserCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   userattributevalue.UserTable,
+			Columns: []string{userattributevalue.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:   userattributevalue.UserTable,
+			Columns: []string{userattributevalue.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 _u.mutation.DefinitionCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   userattributevalue.DefinitionTable,
+			Columns: []string{userattributevalue.DefinitionColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(userattributedefinition.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.DefinitionIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   userattributevalue.DefinitionTable,
+			Columns: []string{userattributevalue.DefinitionColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(userattributedefinition.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	_node = &UserAttributeValue{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{userattributevalue.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}

backend/internal/handler/admin/user_attribute_handler.go

+package admin
+
+import (
+	"strconv"
+
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+// UserAttributeHandler handles user attribute management
+type UserAttributeHandler struct {
+	attrService *service.UserAttributeService
+}
+
+// NewUserAttributeHandler creates a new handler
+func NewUserAttributeHandler(attrService *service.UserAttributeService) *UserAttributeHandler {
+	return &UserAttributeHandler{attrService: attrService}
+}
+
+// --- Request/Response DTOs ---
+
+// CreateAttributeDefinitionRequest represents create attribute definition request
+type CreateAttributeDefinitionRequest struct {
+	Key         string                          `json:"key" binding:"required,min=1,max=100"`
+	Name        string                          `json:"name" binding:"required,min=1,max=255"`
+	Description string                          `json:"description"`
+	Type        string                          `json:"type" binding:"required"`
+	Options     []service.UserAttributeOption   `json:"options"`
+	Required    bool                            `json:"required"`
+	Validation  service.UserAttributeValidation `json:"validation"`
+	Placeholder string                          `json:"placeholder"`
+	Enabled     bool                            `json:"enabled"`
+}
+
+// UpdateAttributeDefinitionRequest represents update attribute definition request
+type UpdateAttributeDefinitionRequest struct {
+	Name        *string                          `json:"name"`
+	Description *string                          `json:"description"`
+	Type        *string                          `json:"type"`
+	Options     *[]service.UserAttributeOption   `json:"options"`
+	Required    *bool                            `json:"required"`
+	Validation  *service.UserAttributeValidation `json:"validation"`
+	Placeholder *string                          `json:"placeholder"`
+	Enabled     *bool                            `json:"enabled"`
+}
+
+// ReorderRequest represents reorder attribute definitions request
+type ReorderRequest struct {
+	IDs []int64 `json:"ids" binding:"required"`
+}
+
+// UpdateUserAttributesRequest represents update user attributes request
+type UpdateUserAttributesRequest struct {
+	Values map[int64]string `json:"values" binding:"required"`
+}
+
+// BatchGetUserAttributesRequest represents batch get user attributes request
+type BatchGetUserAttributesRequest struct {
+	UserIDs []int64 `json:"user_ids" binding:"required"`
+}
+
+// BatchUserAttributesResponse represents batch user attributes response
+type BatchUserAttributesResponse struct {
+	// Map of userID -> map of attributeID -> value
+	Attributes map[int64]map[int64]string `json:"attributes"`
+}
+
+// AttributeDefinitionResponse represents attribute definition response
+type AttributeDefinitionResponse struct {
+	ID           int64                           `json:"id"`
+	Key          string                          `json:"key"`
+	Name         string                          `json:"name"`
+	Description  string                          `json:"description"`
+	Type         string                          `json:"type"`
+	Options      []service.UserAttributeOption   `json:"options"`
+	Required     bool                            `json:"required"`
+	Validation   service.UserAttributeValidation `json:"validation"`
+	Placeholder  string                          `json:"placeholder"`
+	DisplayOrder int                             `json:"display_order"`
+	Enabled      bool                            `json:"enabled"`
+	CreatedAt    string                          `json:"created_at"`
+	UpdatedAt    string                          `json:"updated_at"`
+}
+
+// AttributeValueResponse represents attribute value response
+type AttributeValueResponse struct {
+	ID          int64  `json:"id"`
+	UserID      int64  `json:"user_id"`
+	AttributeID int64  `json:"attribute_id"`
+	Value       string `json:"value"`
+	CreatedAt   string `json:"created_at"`
+	UpdatedAt   string `json:"updated_at"`
+}
+
+// --- Helpers ---
+
+func defToResponse(def *service.UserAttributeDefinition) *AttributeDefinitionResponse {
+	return &AttributeDefinitionResponse{
+		ID:           def.ID,
+		Key:          def.Key,
+		Name:         def.Name,
+		Description:  def.Description,
+		Type:         string(def.Type),
+		Options:      def.Options,
+		Required:     def.Required,
+		Validation:   def.Validation,
+		Placeholder:  def.Placeholder,
+		DisplayOrder: def.DisplayOrder,
+		Enabled:      def.Enabled,
+		CreatedAt:    def.CreatedAt.Format("2006-01-02T15:04:05Z07:00"),
+		UpdatedAt:    def.UpdatedAt.Format("2006-01-02T15:04:05Z07:00"),
+	}
+}
+
+func valueToResponse(val *service.UserAttributeValue) *AttributeValueResponse {
+	return &AttributeValueResponse{
+		ID:          val.ID,
+		UserID:      val.UserID,
+		AttributeID: val.AttributeID,
+		Value:       val.Value,
+		CreatedAt:   val.CreatedAt.Format("2006-01-02T15:04:05Z07:00"),
+		UpdatedAt:   val.UpdatedAt.Format("2006-01-02T15:04:05Z07:00"),
+	}
+}
+
+// --- Handlers ---
+
+// ListDefinitions lists all attribute definitions
+// GET /admin/user-attributes
+func (h *UserAttributeHandler) ListDefinitions(c *gin.Context) {
+	enabledOnly := c.Query("enabled") == "true"
+
+	defs, err := h.attrService.ListDefinitions(c.Request.Context(), enabledOnly)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	out := make([]*AttributeDefinitionResponse, 0, len(defs))
+	for i := range defs {
+		out = append(out, defToResponse(&defs[i]))
+	}
+
+	response.Success(c, out)
+}
+
+// CreateDefinition creates a new attribute definition
+// POST /admin/user-attributes
+func (h *UserAttributeHandler) CreateDefinition(c *gin.Context) {
+	var req CreateAttributeDefinitionRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+
+	def, err := h.attrService.CreateDefinition(c.Request.Context(), service.CreateAttributeDefinitionInput{
+		Key:         req.Key,
+		Name:        req.Name,
+		Description: req.Description,
+		Type:        service.UserAttributeType(req.Type),
+		Options:     req.Options,
+		Required:    req.Required,
+		Validation:  req.Validation,
+		Placeholder: req.Placeholder,
+		Enabled:     req.Enabled,
+	})
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, defToResponse(def))
+}
+
+// UpdateDefinition updates an attribute definition
+// PUT /admin/user-attributes/:id
+func (h *UserAttributeHandler) UpdateDefinition(c *gin.Context) {
+	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid attribute ID")
+		return
+	}
+
+	var req UpdateAttributeDefinitionRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+
+	input := service.UpdateAttributeDefinitionInput{
+		Name:        req.Name,
+		Description: req.Description,
+		Options:     req.Options,
+		Required:    req.Required,
+		Validation:  req.Validation,
+		Placeholder: req.Placeholder,
+		Enabled:     req.Enabled,
+	}
+	if req.Type != nil {
+		t := service.UserAttributeType(*req.Type)
+		input.Type = &t
+	}
+
+	def, err := h.attrService.UpdateDefinition(c.Request.Context(), id, input)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, defToResponse(def))
+}
+
+// DeleteDefinition deletes an attribute definition
+// DELETE /admin/user-attributes/:id
+func (h *UserAttributeHandler) DeleteDefinition(c *gin.Context) {
+	id, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid attribute ID")
+		return
+	}
+
+	if err := h.attrService.DeleteDefinition(c.Request.Context(), id); err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, gin.H{"message": "Attribute definition deleted successfully"})
+}
+
+// ReorderDefinitions reorders attribute definitions
+// PUT /admin/user-attributes/reorder
+func (h *UserAttributeHandler) ReorderDefinitions(c *gin.Context) {
+	var req ReorderRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+
+	// Convert IDs array to orders map (position in array = display_order)
+	orders := make(map[int64]int, len(req.IDs))
+	for i, id := range req.IDs {
+		orders[id] = i
+	}
+
+	if err := h.attrService.ReorderDefinitions(c.Request.Context(), orders); err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, gin.H{"message": "Reorder successful"})
+}
+
+// GetUserAttributes gets a user's attribute values
+// GET /admin/users/:id/attributes
+func (h *UserAttributeHandler) GetUserAttributes(c *gin.Context) {
+	userID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid user ID")
+		return
+	}
+
+	values, err := h.attrService.GetUserAttributes(c.Request.Context(), userID)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	out := make([]*AttributeValueResponse, 0, len(values))
+	for i := range values {
+		out = append(out, valueToResponse(&values[i]))
+	}
+
+	response.Success(c, out)
+}
+
+// UpdateUserAttributes updates a user's attribute values
+// PUT /admin/users/:id/attributes
+func (h *UserAttributeHandler) UpdateUserAttributes(c *gin.Context) {
+	userID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid user ID")
+		return
+	}
+
+	var req UpdateUserAttributesRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+
+	inputs := make([]service.UpdateUserAttributeInput, 0, len(req.Values))
+	for attrID, value := range req.Values {
+		inputs = append(inputs, service.UpdateUserAttributeInput{
+			AttributeID: attrID,
+			Value:       value,
+		})
+	}
+
+	if err := h.attrService.UpdateUserAttributes(c.Request.Context(), userID, inputs); err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	// Return updated values
+	values, err := h.attrService.GetUserAttributes(c.Request.Context(), userID)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	out := make([]*AttributeValueResponse, 0, len(values))
+	for i := range values {
+		out = append(out, valueToResponse(&values[i]))
+	}
+
+	response.Success(c, out)
+}
+
+// GetBatchUserAttributes gets attribute values for multiple users
+// POST /admin/user-attributes/batch
+func (h *UserAttributeHandler) GetBatchUserAttributes(c *gin.Context) {
+	var req BatchGetUserAttributesRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+
+	if len(req.UserIDs) == 0 {
+		response.Success(c, BatchUserAttributesResponse{Attributes: map[int64]map[int64]string{}})
+		return
+	}
+
+	attrs, err := h.attrService.GetBatchUserAttributes(c.Request.Context(), req.UserIDs)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, BatchUserAttributesResponse{Attributes: attrs})
+}

backend/internal/handler/handler.go

@@ -20,6 +20,7 @@ type AdminHandlers struct {
 	System           *admin.SystemHandler
 	Subscription     *admin.SubscriptionHandler
 	Usage            *admin.UsageHandler
+	UserAttribute    *admin.UserAttributeHandler
 }
 
 // Handlers contains all HTTP handlers

backend/internal/handler/wire.go

@@ -23,6 +23,7 @@ func ProvideAdminHandlers(
 	systemHandler *admin.SystemHandler,
 	subscriptionHandler *admin.SubscriptionHandler,
 	usageHandler *admin.UsageHandler,
+	userAttributeHandler *admin.UserAttributeHandler,
 ) *AdminHandlers {
 	return &AdminHandlers{
 		Dashboard:        dashboardHandler,
@@ -39,6 +40,7 @@ func ProvideAdminHandlers(
 		System:           systemHandler,
 		Subscription:     subscriptionHandler,
 		Usage:            usageHandler,
+		UserAttribute:    userAttributeHandler,
 	}
 }
 
@@ -107,6 +109,7 @@ var ProviderSet = wire.NewSet(
 	ProvideSystemHandler,
 	admin.NewSubscriptionHandler,
 	admin.NewUsageHandler,
+	admin.NewUserAttributeHandler,
 
 	// AdminHandlers and Handlers constructors
 	ProvideAdminHandlers,

backend/internal/repository/user_attribute_repo.go

+package repository
+
+import (
+	"context"
+	"database/sql"
+
+	dbent "github.com/Wei-Shaw/sub2api/ent"
+	"github.com/Wei-Shaw/sub2api/ent/userattributedefinition"
+	"github.com/Wei-Shaw/sub2api/ent/userattributevalue"
+	"github.com/Wei-Shaw/sub2api/internal/service"
+)
+
+// UserAttributeDefinitionRepository implementation
+type userAttributeDefinitionRepository struct {
+	client *dbent.Client
+}
+
+// NewUserAttributeDefinitionRepository creates a new repository instance
+func NewUserAttributeDefinitionRepository(client *dbent.Client) service.UserAttributeDefinitionRepository {
+	return &userAttributeDefinitionRepository{client: client}
+}
+
+func (r *userAttributeDefinitionRepository) Create(ctx context.Context, def *service.UserAttributeDefinition) error {
+	client := clientFromContext(ctx, r.client)
+
+	created, err := client.UserAttributeDefinition.Create().
+		SetKey(def.Key).
+		SetName(def.Name).
+		SetDescription(def.Description).
+		SetType(string(def.Type)).
+		SetOptions(toEntOptions(def.Options)).
+		SetRequired(def.Required).
+		SetValidation(toEntValidation(def.Validation)).
+		SetPlaceholder(def.Placeholder).
+		SetEnabled(def.Enabled).
+		Save(ctx)
+
+	if err != nil {
+		return translatePersistenceError(err, nil, service.ErrAttributeKeyExists)
+	}
+
+	def.ID = created.ID
+	def.DisplayOrder = created.DisplayOrder
+	def.CreatedAt = created.CreatedAt
+	def.UpdatedAt = created.UpdatedAt
+	return nil
+}
+
+func (r *userAttributeDefinitionRepository) GetByID(ctx context.Context, id int64) (*service.UserAttributeDefinition, error) {
+	client := clientFromContext(ctx, r.client)
+
+	e, err := client.UserAttributeDefinition.Query().
+		Where(userattributedefinition.IDEQ(id)).
+		Only(ctx)
+	if err != nil {
+		return nil, translatePersistenceError(err, service.ErrAttributeDefinitionNotFound, nil)
+	}
+	return defEntityToService(e), nil
+}
+
+func (r *userAttributeDefinitionRepository) GetByKey(ctx context.Context, key string) (*service.UserAttributeDefinition, error) {
+	client := clientFromContext(ctx, r.client)
+
+	e, err := client.UserAttributeDefinition.Query().
+		Where(userattributedefinition.KeyEQ(key)).
+		Only(ctx)
+	if err != nil {
+		return nil, translatePersistenceError(err, service.ErrAttributeDefinitionNotFound, nil)
+	}
+	return defEntityToService(e), nil
+}
+
+func (r *userAttributeDefinitionRepository) Update(ctx context.Context, def *service.UserAttributeDefinition) error {
+	client := clientFromContext(ctx, r.client)
+
+	updated, err := client.UserAttributeDefinition.UpdateOneID(def.ID).
+		SetName(def.Name).
+		SetDescription(def.Description).
+		SetType(string(def.Type)).
+		SetOptions(toEntOptions(def.Options)).
+		SetRequired(def.Required).
+		SetValidation(toEntValidation(def.Validation)).
+		SetPlaceholder(def.Placeholder).
+		SetDisplayOrder(def.DisplayOrder).
+		SetEnabled(def.Enabled).
+		Save(ctx)
+
+	if err != nil {
+		return translatePersistenceError(err, service.ErrAttributeDefinitionNotFound, service.ErrAttributeKeyExists)
+	}
+
+	def.UpdatedAt = updated.UpdatedAt
+	return nil
+}
+
+func (r *userAttributeDefinitionRepository) Delete(ctx context.Context, id int64) error {
+	client := clientFromContext(ctx, r.client)
+
+	_, err := client.UserAttributeDefinition.Delete().
+		Where(userattributedefinition.IDEQ(id)).
+		Exec(ctx)
+	return translatePersistenceError(err, service.ErrAttributeDefinitionNotFound, nil)
+}
+
+func (r *userAttributeDefinitionRepository) List(ctx context.Context, enabledOnly bool) ([]service.UserAttributeDefinition, error) {
+	client := clientFromContext(ctx, r.client)
+
+	q := client.UserAttributeDefinition.Query()
+	if enabledOnly {
+		q = q.Where(userattributedefinition.EnabledEQ(true))
+	}
+
+	entities, err := q.Order(dbent.Asc(userattributedefinition.FieldDisplayOrder)).All(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	result := make([]service.UserAttributeDefinition, 0, len(entities))
+	for _, e := range entities {
+		result = append(result, *defEntityToService(e))
+	}
+	return result, nil
+}
+
+func (r *userAttributeDefinitionRepository) UpdateDisplayOrders(ctx context.Context, orders map[int64]int) error {
+	tx, err := r.client.Tx(ctx)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = tx.Rollback() }()
+
+	for id, order := range orders {
+		if _, err := tx.UserAttributeDefinition.UpdateOneID(id).
+			SetDisplayOrder(order).
+			Save(ctx); err != nil {
+			return translatePersistenceError(err, service.ErrAttributeDefinitionNotFound, nil)
+		}
+	}
+
+	return tx.Commit()
+}
+
+func (r *userAttributeDefinitionRepository) ExistsByKey(ctx context.Context, key string) (bool, error) {
+	client := clientFromContext(ctx, r.client)
+	return client.UserAttributeDefinition.Query().
+		Where(userattributedefinition.KeyEQ(key)).
+		Exist(ctx)
+}
+
+// UserAttributeValueRepository implementation
+type userAttributeValueRepository struct {
+	client *dbent.Client
+	sql    *sql.DB
+}
+
+// NewUserAttributeValueRepository creates a new repository instance
+func NewUserAttributeValueRepository(client *dbent.Client, sqlDB *sql.DB) service.UserAttributeValueRepository {
+	return &userAttributeValueRepository{client: client, sql: sqlDB}
+}
+
+func (r *userAttributeValueRepository) GetByUserID(ctx context.Context, userID int64) ([]service.UserAttributeValue, error) {
+	client := clientFromContext(ctx, r.client)
+
+	entities, err := client.UserAttributeValue.Query().
+		Where(userattributevalue.UserIDEQ(userID)).
+		All(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	result := make([]service.UserAttributeValue, 0, len(entities))
+	for _, e := range entities {
+		result = append(result, service.UserAttributeValue{
+			ID:          e.ID,
+			UserID:      e.UserID,
+			AttributeID: e.AttributeID,
+			Value:       e.Value,
+			CreatedAt:   e.CreatedAt,
+			UpdatedAt:   e.UpdatedAt,
+		})
+	}
+	return result, nil
+}
+
+func (r *userAttributeValueRepository) GetByUserIDs(ctx context.Context, userIDs []int64) ([]service.UserAttributeValue, error) {
+	if len(userIDs) == 0 {
+		return []service.UserAttributeValue{}, nil
+	}
+
+	client := clientFromContext(ctx, r.client)
+
+	entities, err := client.UserAttributeValue.Query().
+		Where(userattributevalue.UserIDIn(userIDs...)).
+		All(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	result := make([]service.UserAttributeValue, 0, len(entities))
+	for _, e := range entities {
+		result = append(result, service.UserAttributeValue{
+			ID:          e.ID,
+			UserID:      e.UserID,
+			AttributeID: e.AttributeID,
+			Value:       e.Value,
+			CreatedAt:   e.CreatedAt,
+			UpdatedAt:   e.UpdatedAt,
+		})
+	}
+	return result, nil
+}
+
+func (r *userAttributeValueRepository) UpsertBatch(ctx context.Context, userID int64, inputs []service.UpdateUserAttributeInput) error {
+	if len(inputs) == 0 {
+		return nil
+	}
+
+	tx, err := r.client.Tx(ctx)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = tx.Rollback() }()
+
+	for _, input := range inputs {
+		// Use upsert (ON CONFLICT DO UPDATE)
+		err := tx.UserAttributeValue.Create().
+			SetUserID(userID).
+			SetAttributeID(input.AttributeID).
+			SetValue(input.Value).
+			OnConflictColumns(userattributevalue.FieldUserID, userattributevalue.FieldAttributeID).
+			UpdateValue().
+			UpdateUpdatedAt().
+			Exec(ctx)
+		if err != nil {
+			return err
+		}
+	}
+
+	return tx.Commit()
+}
+
+func (r *userAttributeValueRepository) DeleteByAttributeID(ctx context.Context, attributeID int64) error {
+	client := clientFromContext(ctx, r.client)
+
+	_, err := client.UserAttributeValue.Delete().
+		Where(userattributevalue.AttributeIDEQ(attributeID)).
+		Exec(ctx)
+	return err
+}
+
+func (r *userAttributeValueRepository) DeleteByUserID(ctx context.Context, userID int64) error {
+	client := clientFromContext(ctx, r.client)
+
+	_, err := client.UserAttributeValue.Delete().
+		Where(userattributevalue.UserIDEQ(userID)).
+		Exec(ctx)
+	return err
+}
+
+// Helper functions for entity to service conversion
+func defEntityToService(e *dbent.UserAttributeDefinition) *service.UserAttributeDefinition {
+	if e == nil {
+		return nil
+	}
+	return &service.UserAttributeDefinition{
+		ID:           e.ID,
+		Key:          e.Key,
+		Name:         e.Name,
+		Description:  e.Description,
+		Type:         service.UserAttributeType(e.Type),
+		Options:      toServiceOptions(e.Options),
+		Required:     e.Required,
+		Validation:   toServiceValidation(e.Validation),
+		Placeholder:  e.Placeholder,
+		DisplayOrder: e.DisplayOrder,
+		Enabled:      e.Enabled,
+		CreatedAt:    e.CreatedAt,
+		UpdatedAt:    e.UpdatedAt,
+	}
+}
+
+// Type conversion helpers (map types <-> service types)
+func toEntOptions(opts []service.UserAttributeOption) []map[string]any {
+	if opts == nil {
+		return []map[string]any{}
+	}
+	result := make([]map[string]any, len(opts))
+	for i, o := range opts {
+		result[i] = map[string]any{"value": o.Value, "label": o.Label}
+	}
+	return result
+}
+
+func toServiceOptions(opts []map[string]any) []service.UserAttributeOption {
+	if opts == nil {
+		return []service.UserAttributeOption{}
+	}
+	result := make([]service.UserAttributeOption, len(opts))
+	for i, o := range opts {
+		result[i] = service.UserAttributeOption{
+			Value: getString(o, "value"),
+			Label: getString(o, "label"),
+		}
+	}
+	return result
+}
+
+func toEntValidation(v service.UserAttributeValidation) map[string]any {
+	result := map[string]any{}
+	if v.MinLength != nil {
+		result["min_length"] = *v.MinLength
+	}
+	if v.MaxLength != nil {
+		result["max_length"] = *v.MaxLength
+	}
+	if v.Min != nil {
+		result["min"] = *v.Min
+	}
+	if v.Max != nil {
+		result["max"] = *v.Max
+	}
+	if v.Pattern != nil {
+		result["pattern"] = *v.Pattern
+	}
+	if v.Message != nil {
+		result["message"] = *v.Message
+	}
+	return result
+}
+
+func toServiceValidation(v map[string]any) service.UserAttributeValidation {
+	result := service.UserAttributeValidation{}
+	if val := getInt(v, "min_length"); val != nil {
+		result.MinLength = val
+	}
+	if val := getInt(v, "max_length"); val != nil {
+		result.MaxLength = val
+	}
+	if val := getInt(v, "min"); val != nil {
+		result.Min = val
+	}
+	if val := getInt(v, "max"); val != nil {
+		result.Max = val
+	}
+	if val := getStringPtr(v, "pattern"); val != nil {
+		result.Pattern = val
+	}
+	if val := getStringPtr(v, "message"); val != nil {
+		result.Message = val
+	}
+	return result
+}
+
+// Helper functions for type conversion
+func getString(m map[string]any, key string) string {
+	if v, ok := m[key]; ok {
+		if s, ok := v.(string); ok {
+			return s
+		}
+	}
+	return ""
+}
+
+func getStringPtr(m map[string]any, key string) *string {
+	if v, ok := m[key]; ok {
+		if s, ok := v.(string); ok {
+			return &s
+		}
+	}
+	return nil
+}
+
+func getInt(m map[string]any, key string) *int {
+	if v, ok := m[key]; ok {
+		switch n := v.(type) {
+		case int:
+			return &n
+		case int64:
+			i := int(n)
+			return &i
+		case float64:
+			i := int(n)
+			return &i
+		}
+	}
+	return nil
+}

backend/internal/repository/wire.go

@@ -36,6 +36,8 @@ var ProviderSet = wire.NewSet(
 	NewUsageLogRepository,
 	NewSettingRepository,
 	NewUserSubscriptionRepository,
+	NewUserAttributeDefinitionRepository,
+	NewUserAttributeValueRepository,
 
 	// Cache implementations
 	NewGatewayCache,

backend/internal/server/routes/admin.go

@@ -54,6 +54,9 @@ func RegisterAdminRoutes(
 
 		// 使用记录管理
 		registerUsageRoutes(admin, h)
+
+		// 用户属性管理
+		registerUserAttributeRoutes(admin, h)
 	}
 }
 
@@ -82,6 +85,10 @@ func registerUserManagementRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 		users.POST("/:id/balance", h.Admin.User.UpdateBalance)
 		users.GET("/:id/api-keys", h.Admin.User.GetUserAPIKeys)
 		users.GET("/:id/usage", h.Admin.User.GetUserUsage)
+
+		// User attribute values
+		users.GET("/:id/attributes", h.Admin.UserAttribute.GetUserAttributes)
+		users.PUT("/:id/attributes", h.Admin.UserAttribute.UpdateUserAttributes)
 	}
 }
 
@@ -242,3 +249,15 @@ func registerUsageRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 		usage.GET("/search-api-keys", h.Admin.Usage.SearchApiKeys)
 	}
 }
+
+func registerUserAttributeRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
+	attrs := admin.Group("/user-attributes")
+	{
+		attrs.GET("", h.Admin.UserAttribute.ListDefinitions)
+		attrs.POST("", h.Admin.UserAttribute.CreateDefinition)
+		attrs.POST("/batch", h.Admin.UserAttribute.GetBatchUserAttributes)
+		attrs.PUT("/reorder", h.Admin.UserAttribute.ReorderDefinitions)
+		attrs.PUT("/:id", h.Admin.UserAttribute.UpdateDefinition)
+		attrs.DELETE("/:id", h.Admin.UserAttribute.DeleteDefinition)
+	}
+}

backend/internal/service/user_attribute.go

+package service
+
+import (
+	"context"
+	"time"
+
+	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
+)
+
+// Error definitions for user attribute operations
+var (
+	ErrAttributeDefinitionNotFound = infraerrors.NotFound("ATTRIBUTE_DEFINITION_NOT_FOUND", "attribute definition not found")
+	ErrAttributeKeyExists          = infraerrors.Conflict("ATTRIBUTE_KEY_EXISTS", "attribute key already exists")
+	ErrInvalidAttributeType        = infraerrors.BadRequest("INVALID_ATTRIBUTE_TYPE", "invalid attribute type")
+	ErrAttributeValidationFailed   = infraerrors.BadRequest("ATTRIBUTE_VALIDATION_FAILED", "attribute value validation failed")
+)
+
+// UserAttributeType represents supported attribute types
+type UserAttributeType string
+
+const (
+	AttributeTypeText        UserAttributeType = "text"
+	AttributeTypeTextarea    UserAttributeType = "textarea"
+	AttributeTypeNumber      UserAttributeType = "number"
+	AttributeTypeEmail       UserAttributeType = "email"
+	AttributeTypeURL         UserAttributeType = "url"
+	AttributeTypeDate        UserAttributeType = "date"
+	AttributeTypeSelect      UserAttributeType = "select"
+	AttributeTypeMultiSelect UserAttributeType = "multi_select"
+)
+
+// UserAttributeOption represents a select option for select/multi_select types
+type UserAttributeOption struct {
+	Value string `json:"value"`
+	Label string `json:"label"`
+}
+
+// UserAttributeValidation represents validation rules for an attribute
+type UserAttributeValidation struct {
+	MinLength *int    `json:"min_length,omitempty"`
+	MaxLength *int    `json:"max_length,omitempty"`
+	Min       *int    `json:"min,omitempty"`
+	Max       *int    `json:"max,omitempty"`
+	Pattern   *string `json:"pattern,omitempty"`
+	Message   *string `json:"message,omitempty"`
+}
+
+// UserAttributeDefinition represents a custom attribute definition
+type UserAttributeDefinition struct {
+	ID           int64
+	Key          string
+	Name         string
+	Description  string
+	Type         UserAttributeType
+	Options      []UserAttributeOption
+	Required     bool
+	Validation   UserAttributeValidation
+	Placeholder  string
+	DisplayOrder int
+	Enabled      bool
+	CreatedAt    time.Time
+	UpdatedAt    time.Time
+}
+
+// UserAttributeValue represents a user's attribute value
+type UserAttributeValue struct {
+	ID          int64
+	UserID      int64
+	AttributeID int64
+	Value       string
+	CreatedAt   time.Time
+	UpdatedAt   time.Time
+}
+
+// CreateAttributeDefinitionInput for creating new definition
+type CreateAttributeDefinitionInput struct {
+	Key         string
+	Name        string
+	Description string
+	Type        UserAttributeType
+	Options     []UserAttributeOption
+	Required    bool
+	Validation  UserAttributeValidation
+	Placeholder string
+	Enabled     bool
+}
+
+// UpdateAttributeDefinitionInput for updating definition
+type UpdateAttributeDefinitionInput struct {
+	Name        *string
+	Description *string
+	Type        *UserAttributeType
+	Options     *[]UserAttributeOption
+	Required    *bool
+	Validation  *UserAttributeValidation
+	Placeholder *string
+	Enabled     *bool
+}
+
+// UpdateUserAttributeInput for updating a single attribute value
+type UpdateUserAttributeInput struct {
+	AttributeID int64
+	Value       string
+}
+
+// UserAttributeDefinitionRepository interface for attribute definition persistence
+type UserAttributeDefinitionRepository interface {
+	Create(ctx context.Context, def *UserAttributeDefinition) error
+	GetByID(ctx context.Context, id int64) (*UserAttributeDefinition, error)
+	GetByKey(ctx context.Context, key string) (*UserAttributeDefinition, error)
+	Update(ctx context.Context, def *UserAttributeDefinition) error
+	Delete(ctx context.Context, id int64) error
+	List(ctx context.Context, enabledOnly bool) ([]UserAttributeDefinition, error)
+	UpdateDisplayOrders(ctx context.Context, orders map[int64]int) error
+	ExistsByKey(ctx context.Context, key string) (bool, error)
+}
+
+// UserAttributeValueRepository interface for user attribute value persistence
+type UserAttributeValueRepository interface {
+	GetByUserID(ctx context.Context, userID int64) ([]UserAttributeValue, error)
+	GetByUserIDs(ctx context.Context, userIDs []int64) ([]UserAttributeValue, error)
+	UpsertBatch(ctx context.Context, userID int64, values []UpdateUserAttributeInput) error
+	DeleteByAttributeID(ctx context.Context, attributeID int64) error
+	DeleteByUserID(ctx context.Context, userID int64) error
+}

backend/internal/service/user_attribute_service.go

+package service
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+
+	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
+)
+
+// UserAttributeService handles attribute management
+type UserAttributeService struct {
+	defRepo   UserAttributeDefinitionRepository
+	valueRepo UserAttributeValueRepository
+}
+
+// NewUserAttributeService creates a new service instance
+func NewUserAttributeService(
+	defRepo UserAttributeDefinitionRepository,
+	valueRepo UserAttributeValueRepository,
+) *UserAttributeService {
+	return &UserAttributeService{
+		defRepo:   defRepo,
+		valueRepo: valueRepo,
+	}
+}
+
+// CreateDefinition creates a new attribute definition
+func (s *UserAttributeService) CreateDefinition(ctx context.Context, input CreateAttributeDefinitionInput) (*UserAttributeDefinition, error) {
+	// Validate type
+	if !isValidAttributeType(input.Type) {
+		return nil, ErrInvalidAttributeType
+	}
+
+	// Check if key exists
+	exists, err := s.defRepo.ExistsByKey(ctx, input.Key)
+	if err != nil {
+		return nil, fmt.Errorf("check key exists: %w", err)
+	}
+	if exists {
+		return nil, ErrAttributeKeyExists
+	}
+
+	def := &UserAttributeDefinition{
+		Key:         input.Key,
+		Name:        input.Name,
+		Description: input.Description,
+		Type:        input.Type,
+		Options:     input.Options,
+		Required:    input.Required,
+		Validation:  input.Validation,
+		Placeholder: input.Placeholder,
+		Enabled:     input.Enabled,
+	}
+
+	if err := s.defRepo.Create(ctx, def); err != nil {
+		return nil, fmt.Errorf("create definition: %w", err)
+	}
+
+	return def, nil
+}
+
+// GetDefinition retrieves a definition by ID
+func (s *UserAttributeService) GetDefinition(ctx context.Context, id int64) (*UserAttributeDefinition, error) {
+	return s.defRepo.GetByID(ctx, id)
+}
+
+// ListDefinitions lists all definitions
+func (s *UserAttributeService) ListDefinitions(ctx context.Context, enabledOnly bool) ([]UserAttributeDefinition, error) {
+	return s.defRepo.List(ctx, enabledOnly)
+}
+
+// UpdateDefinition updates an existing definition
+func (s *UserAttributeService) UpdateDefinition(ctx context.Context, id int64, input UpdateAttributeDefinitionInput) (*UserAttributeDefinition, error) {
+	def, err := s.defRepo.GetByID(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+
+	if input.Name != nil {
+		def.Name = *input.Name
+	}
+	if input.Description != nil {
+		def.Description = *input.Description
+	}
+	if input.Type != nil {
+		if !isValidAttributeType(*input.Type) {
+			return nil, ErrInvalidAttributeType
+		}
+		def.Type = *input.Type
+	}
+	if input.Options != nil {
+		def.Options = *input.Options
+	}
+	if input.Required != nil {
+		def.Required = *input.Required
+	}
+	if input.Validation != nil {
+		def.Validation = *input.Validation
+	}
+	if input.Placeholder != nil {
+		def.Placeholder = *input.Placeholder
+	}
+	if input.Enabled != nil {
+		def.Enabled = *input.Enabled
+	}
+
+	if err := s.defRepo.Update(ctx, def); err != nil {
+		return nil, fmt.Errorf("update definition: %w", err)
+	}
+
+	return def, nil
+}
+
+// DeleteDefinition soft-deletes a definition and hard-deletes associated values
+func (s *UserAttributeService) DeleteDefinition(ctx context.Context, id int64) error {
+	// Check if definition exists
+	_, err := s.defRepo.GetByID(ctx, id)
+	if err != nil {
+		return err
+	}
+
+	// First delete all values (hard delete)
+	if err := s.valueRepo.DeleteByAttributeID(ctx, id); err != nil {
+		return fmt.Errorf("delete values: %w", err)
+	}
+
+	// Then soft-delete the definition
+	if err := s.defRepo.Delete(ctx, id); err != nil {
+		return fmt.Errorf("delete definition: %w", err)
+	}
+
+	return nil
+}
+
+// ReorderDefinitions updates display order for multiple definitions
+func (s *UserAttributeService) ReorderDefinitions(ctx context.Context, orders map[int64]int) error {
+	return s.defRepo.UpdateDisplayOrders(ctx, orders)
+}
+
+// GetUserAttributes retrieves all attribute values for a user
+func (s *UserAttributeService) GetUserAttributes(ctx context.Context, userID int64) ([]UserAttributeValue, error) {
+	return s.valueRepo.GetByUserID(ctx, userID)
+}
+
+// GetBatchUserAttributes retrieves attribute values for multiple users
+// Returns a map of userID -> map of attributeID -> value
+func (s *UserAttributeService) GetBatchUserAttributes(ctx context.Context, userIDs []int64) (map[int64]map[int64]string, error) {
+	values, err := s.valueRepo.GetByUserIDs(ctx, userIDs)
+	if err != nil {
+		return nil, err
+	}
+
+	result := make(map[int64]map[int64]string)
+	for _, v := range values {
+		if result[v.UserID] == nil {
+			result[v.UserID] = make(map[int64]string)
+		}
+		result[v.UserID][v.AttributeID] = v.Value
+	}
+
+	return result, nil
+}
+
+// UpdateUserAttributes batch updates attribute values for a user
+func (s *UserAttributeService) UpdateUserAttributes(ctx context.Context, userID int64, inputs []UpdateUserAttributeInput) error {
+	// Validate all values before updating
+	defs, err := s.defRepo.List(ctx, true)
+	if err != nil {
+		return fmt.Errorf("list definitions: %w", err)
+	}
+
+	defMap := make(map[int64]*UserAttributeDefinition, len(defs))
+	for i := range defs {
+		defMap[defs[i].ID] = &defs[i]
+	}
+
+	for _, input := range inputs {
+		def, ok := defMap[input.AttributeID]
+		if !ok {
+			return ErrAttributeDefinitionNotFound
+		}
+
+		if err := s.validateValue(def, input.Value); err != nil {
+			return err
+		}
+	}
+
+	return s.valueRepo.UpsertBatch(ctx, userID, inputs)
+}
+
+// validateValue validates a value against its definition
+func (s *UserAttributeService) validateValue(def *UserAttributeDefinition, value string) error {
+	// Skip validation for empty non-required fields
+	if value == "" && !def.Required {
+		return nil
+	}
+
+	// Required check
+	if def.Required && value == "" {
+		return validationError(fmt.Sprintf("%s is required", def.Name))
+	}
+
+	v := def.Validation
+
+	// String length validation
+	if v.MinLength != nil && len(value) < *v.MinLength {
+		return validationError(fmt.Sprintf("%s must be at least %d characters", def.Name, *v.MinLength))
+	}
+	if v.MaxLength != nil && len(value) > *v.MaxLength {
+		return validationError(fmt.Sprintf("%s must be at most %d characters", def.Name, *v.MaxLength))
+	}
+
+	// Number validation
+	if def.Type == AttributeTypeNumber && value != "" {
+		num, err := strconv.Atoi(value)
+		if err != nil {
+			return validationError(fmt.Sprintf("%s must be a number", def.Name))
+		}
+		if v.Min != nil && num < *v.Min {
+			return validationError(fmt.Sprintf("%s must be at least %d", def.Name, *v.Min))
+		}
+		if v.Max != nil && num > *v.Max {
+			return validationError(fmt.Sprintf("%s must be at most %d", def.Name, *v.Max))
+		}
+	}
+
+	// Pattern validation
+	if v.Pattern != nil && *v.Pattern != "" && value != "" {
+		re, err := regexp.Compile(*v.Pattern)
+		if err == nil && !re.MatchString(value) {
+			msg := def.Name + " format is invalid"
+			if v.Message != nil && *v.Message != "" {
+				msg = *v.Message
+			}
+			return validationError(msg)
+		}
+	}
+
+	// Select validation
+	if def.Type == AttributeTypeSelect && value != "" {
+		found := false
+		for _, opt := range def.Options {
+			if opt.Value == value {
+				found = true
+				break
+			}
+		}
+		if !found {
+			return validationError(fmt.Sprintf("%s: invalid option", def.Name))
+		}
+	}
+
+	// Multi-select validation (stored as JSON array)
+	if def.Type == AttributeTypeMultiSelect && value != "" {
+		var values []string
+		if err := json.Unmarshal([]byte(value), &values); err != nil {
+			// Try comma-separated fallback
+			values = strings.Split(value, ",")
+		}
+		for _, val := range values {
+			val = strings.TrimSpace(val)
+			found := false
+			for _, opt := range def.Options {
+				if opt.Value == val {
+					found = true
+					break
+				}
+			}
+			if !found {
+				return validationError(fmt.Sprintf("%s: invalid option %s", def.Name, val))
+			}
+		}
+	}
+
+	return nil
+}
+
+// validationError creates a validation error with a custom message
+func validationError(msg string) error {
+	return infraerrors.BadRequest("ATTRIBUTE_VALIDATION_FAILED", msg)
+}
+
+func isValidAttributeType(t UserAttributeType) bool {
+	switch t {
+	case AttributeTypeText, AttributeTypeTextarea, AttributeTypeNumber,
+		AttributeTypeEmail, AttributeTypeURL, AttributeTypeDate,
+		AttributeTypeSelect, AttributeTypeMultiSelect:
+		return true
+	}
+	return false
+}

backend/internal/service/wire.go

@@ -125,4 +125,5 @@ var ProviderSet = wire.NewSet(
 	ProvideTimingWheelService,
 	ProvideDeferredService,
 	ProvideAntigravityQuotaRefresher,
+	NewUserAttributeService,
 )

backend/migrations/018_user_attributes.sql

+-- Add user attribute definitions and values tables for custom user attributes.
+
+-- User Attribute Definitions table (with soft delete support)
+CREATE TABLE IF NOT EXISTS user_attribute_definitions (
+    id              BIGSERIAL PRIMARY KEY,
+    key             VARCHAR(100) NOT NULL,
+    name            VARCHAR(255) NOT NULL,
+    description     TEXT DEFAULT '',
+    type            VARCHAR(20) NOT NULL,
+    options         JSONB DEFAULT '[]'::jsonb,
+    required        BOOLEAN NOT NULL DEFAULT FALSE,
+    validation      JSONB DEFAULT '{}'::jsonb,
+    placeholder     VARCHAR(255) DEFAULT '',
+    display_order   INT NOT NULL DEFAULT 0,
+    enabled         BOOLEAN NOT NULL DEFAULT TRUE,
+    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    deleted_at      TIMESTAMPTZ
+);
+
+-- Partial unique index for key (only for non-deleted records)
+-- Allows reusing keys after soft delete
+CREATE UNIQUE INDEX IF NOT EXISTS idx_user_attribute_definitions_key_unique
+    ON user_attribute_definitions(key) WHERE deleted_at IS NULL;
+
+CREATE INDEX IF NOT EXISTS idx_user_attribute_definitions_enabled
+    ON user_attribute_definitions(enabled);
+CREATE INDEX IF NOT EXISTS idx_user_attribute_definitions_display_order
+    ON user_attribute_definitions(display_order);
+CREATE INDEX IF NOT EXISTS idx_user_attribute_definitions_deleted_at
+    ON user_attribute_definitions(deleted_at);
+
+-- User Attribute Values table (hard delete only, no deleted_at)
+CREATE TABLE IF NOT EXISTS user_attribute_values (
+    id              BIGSERIAL PRIMARY KEY,
+    user_id         BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    attribute_id    BIGINT NOT NULL REFERENCES user_attribute_definitions(id) ON DELETE CASCADE,
+    value           TEXT DEFAULT '',
+    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+
+    UNIQUE(user_id, attribute_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_user_attribute_values_user_id
+    ON user_attribute_values(user_id);
+CREATE INDEX IF NOT EXISTS idx_user_attribute_values_attribute_id
+    ON user_attribute_values(attribute_id);