gorm.Model
	Code               string
	Product4ID         uint
	AfterFindCallTimes int
}

func (pi ProductItem) BeforeCreate(*gorm.DB) error {
	if pi.Code == "invalid" {
		return errors.New("invalid item")
	}
	return nil
}

func (pi *ProductItem) AfterFind(*gorm.DB) error {
	pi.AfterFindCallTimes = pi.AfterFindCallTimes + 1
	return nil
}

func TestFailedToSaveAssociationShouldRollback(t *testing.T) {