t.Fatalf("rows affected expects: %v, got %v", 1, results.RowsAffected)
		}

		u1 = user{} // important to reinitialize this before creating it again
		u2 := user{}
		db := DB.Session(&gorm.Session{CreateBatchSize: 10})

		if results := db.Create([]*user{&u1, &u2}); results.Error != nil {
			t.Fatalf("errors happened on create: %v", results.Error)
		} else if results.RowsAffected != 2 {

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++ {

		t.Fatalf("errors happened when update: %v", err)
	}

	var user3 User
	DB.Preload("Languages").Preload("Friends").Find(&user3, "id = ?", user.ID)
	CheckUser(t, user2, user3)

	if err := DB.Session(&gorm.Session{FullSaveAssociations: true}).Save(&user).Error; err != nil {
		t.Fatalf("errors happened when update: %v", err)
	}

	var user4 User
	DB.Preload("Languages").Preload("Friends").Find(&user4, "id = ?", user.ID)

}

func TestBelongsToDefaultValue(t *testing.T) {
	type Org struct {
		ID string
	}
	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{})

	if err := DB.Delete(&User{}).Error; err == nil || !errors.Is(err, gorm.ErrMissingWhereClause) {
		t.Errorf("should returns missing WHERE clause while deleting error")
	}

	if err := DB.Session(&gorm.Session{AllowGlobalUpdate: true}).Delete(&User{}).Error; err != nil {
		t.Errorf("should returns no error while enable global update, but got err %v", err)
	}
}

func TestDeleteWithAssociations(t *testing.T) {

		t.Fatalf("errors happened when update: %v", err)
	}

	var user3 User
	DB.Preload("Pets").Find(&user3, "id = ?", user.ID)
	CheckUser(t, user2, user3)

	if err := DB.Session(&gorm.Session{FullSaveAssociations: true}).Save(&user).Error; err != nil {
		t.Fatalf("errors happened when update: %v", err)
	}

	var user4 User
	DB.Preload("Pets").Find(&user4, "id = ?", user.ID)
	CheckUser(t, user4, user)