(Quick Reference)
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.
