getPersistentValue
目的 Purpose
Retrieve the original value of a field for a domain class instance.
使用例 Examples
def b = Book.get(1) someMethodThatMightModifyTheInstance(b)if (b.isDirty('name')) { def currentName = b.name def originalName = b.getPersistentValue('name') if (currentName != originalName) { … } }
詳細 Description
This method is useful mostly for audit logging or other work done in a beforeUpdate event callback. Hibernate caches the original state of all loaded instances for dirty checking during a flush and this method exposes that data so you can compare it with the current state.