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(Quick Reference)

getPersistentValue

Purpose

Retrieve the original value of a field for a domain class instance.

Examples

def b = Book.get(1)
someMethodThatMightModifyTheInstance(b)

if (b.isDirty('name')) {
    def currentName = b.name
    def originalName = b.getPersistentValue('name')
    if (currentName != originalName) {
        ...
    }
}

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.