hibernate - Grails 领域类事件

Question

我是 Grails 的新手，我对 beforeinsert() 之类的域类 Hook 很好奇, beforeupdate() ， ... ETC。
但是我找不到有关如何使用此功能的良好资源/文档。

有人可以给我一个很好的资源或向我解释这件事是如何工作的吗？

Answer 1

这些方法是连接到域实例生命周期的一种方式。

grails gorm documentation非常干净和精确，所以我将引用那里的定义，但我创建了一个状态图来描绘图片:

• beforeInsert - Executed before an object is initially persisted to the database. If you return false, the insert will be cancelled.
• beforeUpdate - Executed before an object is updated. If you return false, the update will be cancelled.
• beforeDelete - Executed before an object is deleted. If you return false, the delete will be cancelled.
• beforeValidate - Executed before an object is validated
• afterInsert - Executed after an object is persisted to the database
• afterUpdate - Executed after an object has been updated
• afterDelete - Executed after an object has been deleted
• onLoad - Executed when an object is loaded from the database