queryConds := rel.ToQueryConditions(db.Statement.Context, db.Statement.ReflectValue)
				modelValue := reflect.New(rel.FieldSchema.ModelType).Interface()
				tx := db.Session(&gorm.Session{NewDB: true}).Model(modelValue)
				withoutConditions := false
				if db.Statement.Unscoped {
					tx = tx.Unscoped()
				}

				if len(db.Statement.Selects) > 0 {
					selects := make([]string, 0, len(db.Statement.Selects))

	Owner string
}

func (s Product3) BeforeCreate(tx *gorm.DB) (err error) {
	tx.Statement.SetColumn("Price", s.Price+100)
	return nil
}

func (s Product3) BeforeUpdate(tx *gorm.DB) (err error) {
	if tx.Statement.Changed() {
		tx.Statement.SetColumn("Price", s.Price+10)
	}

	if tx.Statement.Changed("Code") {
		s.Price += 20
		tx.Statement.SetColumn("Price", s.Price+30)
	}
	return nil
}

		modelValue = reflect.New(association.Relationship.FieldSchema.ModelType).Interface()
		tx         = association.DB.Model(modelValue)
	)

	if association.Relationship.JoinTable != nil {
		if !tx.Statement.Unscoped && len(association.Relationship.JoinTable.QueryClauses) > 0 {

import (
	"reflect"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
)

// Migrator returns migrator
func (db *DB) Migrator() Migrator {
	tx := db.getInstance()

	// apply scopes to migrator
	for len(tx.Statement.scopes) > 0 {
		tx = tx.executeScopes()
	}

	return tx.Dialector.Migrator(tx.Session(&Session{}))
}

// AutoMigrate run auto migration for given models
func (db *DB) AutoMigrate(dst ...interface{}) error {

	}

	db := DB.Scopes(func(tx *gorm.DB) *gorm.DB {
		return tx.Table("custom_table")
	}).Session(&gorm.Session{})

	db.AutoMigrate(&User{})
	if db.Find(&User{}).Statement.Table != "custom_table" {
		t.Errorf("failed to call Scopes")
	}

	result := DB.Scopes(NameIn1And2, func(tx *gorm.DB) *gorm.DB {
		return tx.Session(&gorm.Session{})
	}).Find(&users1)

	if result.RowsAffected != 2 {

)

func BeginTransaction(db *gorm.DB) {
	if !db.Config.SkipDefaultTransaction && db.Error == nil {
		if tx := db.Begin(); tx.Error == nil {
			db.Statement.ConnPool = tx.Statement.ConnPool
			db.InstanceSet("gorm:started_transaction", true)
		} else if tx.Error == gorm.ErrInvalidTransaction {
			tx.Error = nil
		} else {
			db.Error = tx.Error
		}
	}
}

func CommitOrRollbackTransaction(db *gorm.DB) {

	}
	type BelongsToUser struct {
		OrgID string
		Org   Org `gorm:"default:NULL"`
	}

	tx := DB.Session(&gorm.Session{})
	tx.Config.DisableForeignKeyConstraintWhenMigrating = true
	AssertEqual(t, DB.Config.DisableForeignKeyConstraintWhenMigrating, false)

	tx.Migrator().DropTable(&BelongsToUser{}, &Org{})
	tx.AutoMigrate(&BelongsToUser{}, &Org{})

	user := &BelongsToUser{
		Org: Org{

			expect: org,
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			actual := Org{}
			tx := DB.Where("id = ?", org.ID).Session(&gorm.Session{})
			for name, args := range test.preloads {
				tx = tx.Preload(name, args...)
			}
			if err := tx.Find(&actual).Error; err != nil {
				t.Errorf("failed to find org, got err: %v", err)
			}
			AssertEqual(t, actual, test.expect)
		})

	user.UpdatedAt = date
	sql = DB.ToSQL(func(tx *gorm.DB) *gorm.DB {
		return tx.Model(&User{}).Where("id = ?", 100).Updates(user)
	})
	assertEqualSQL(t, `UPDATE "users" SET "created_at"='2021-10-18 00:00:00',"updated_at"='2021-10-18 19:50:09.438',"name"='bar',"age"=22 WHERE id = 100 AND "users"."deleted_at" IS NULL`, sql)

	// update
	sql = DB.ToSQL(func(tx *gorm.DB) *gorm.DB {
		return tx.Model(&User{}).Where("id = ?", 100).Update("name", "Foo bar")

package callbacks

import (
	"reflect"

	"gorm.io/gorm"
)

func callMethod(db *gorm.DB, fc func(value interface{}, tx *gorm.DB) bool) {
	tx := db.Session(&gorm.Session{NewDB: true})
	if called := fc(db.Statement.ReflectValue.Interface(), tx); !called {
		switch db.Statement.ReflectValue.Kind() {
		case reflect.Slice, reflect.Array:
			db.Statement.CurDestIndex = 0
			for i := 0; i < db.Statement.ReflectValue.Len(); i++ {