callbackTypeBeforeUpdate callbackType = "BeforeUpdate"
	callbackTypeAfterCreate  callbackType = "AfterCreate"
	callbackTypeAfterUpdate  callbackType = "AfterUpdate"
	callbackTypeBeforeSave   callbackType = "BeforeSave"
	callbackTypeAfterSave    callbackType = "AfterSave"
	callbackTypeBeforeDelete callbackType = "BeforeDelete"
	callbackTypeAfterDelete  callbackType = "AfterDelete"
	callbackTypeAfterFind    callbackType = "AfterFind"
)

func (s *Product) BeforeUpdate(tx *gorm.DB) (err error) {
	if s.Code == "dont_update" {
		err = errors.New("can't update")
	}
	s.BeforeUpdateCallTimes = s.BeforeUpdateCallTimes + 1
	return
}

func (s *Product) BeforeSave(tx *gorm.DB) (err error) {
	if s.Code == "dont_save" {
		err = errors.New("can't save")
	}
	s.BeforeSaveCallTimes = s.BeforeSaveCallTimes + 1
	return
}

func (s *Product) AfterFind(tx *gorm.DB) (err error) {