def b = Book.get(1)
someMethodThatMightModifyTheInstance(b)
def names = b.dirtyPropertyNames
for (name in names) {
def originalValue = b.getPersistentValue(name)
...
}getDirtyPropertyNames
Purpose
Retrieve the names of modified fields in a domain class instance.
Examples
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 the names of modified fields so you can compare them with the current state.