func (s *Product) BeforeCreate(tx *gorm.DB) (err error) {
	if s.Code == "Invalid" {
		err = errors.New("invalid product")
	}
	s.BeforeCreateCallTimes = s.BeforeCreateCallTimes + 1
	return
}

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
}

	"sync"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/logger"
)

type callbackType string

const (
	callbackTypeBeforeCreate callbackType = "BeforeCreate"
	callbackTypeBeforeUpdate callbackType = "BeforeUpdate"
	callbackTypeAfterCreate  callbackType = "AfterCreate"
	callbackTypeAfterUpdate  callbackType = "AfterUpdate"
	callbackTypeBeforeSave   callbackType = "BeforeSave"
	callbackTypeAfterSave    callbackType = "AfterSave"