package topic // func (topic *Topic) BeforeSave(tx *gorm.DB) (err error) {} // func (topic *Topic) BeforeCreate(tx *gorm.DB) (err error) {} // func (topic *Topic) AfterCreate(tx *gorm.DB) (err error) {} // func (topic *Topic) BeforeUpdate(tx *gorm.DB) (err error) {} // func (topic *Topic) AfterUpdate(tx *gorm.DB) (err error) {} // func (topic *Topic) AfterSave(tx *gorm.DB) (err error) {} // func (topic *Topic) BeforeDelete(tx *gorm.DB) (err error) {} // func (topic *Topic) AfterDelete(tx *gorm.DB) (err error) {} // func (topic *Topic) AfterFind(tx *gorm.DB) (err error) {}