Detecting a property change on Doctrine2 listener

changeset.php

private function updateLastUpdateDate(LifecycleEventArgs $eventArgs)
{
    $changeSet = $eventArgs->getEntityManager()->getUnitOfWork()->getEntityChangeSet($this);
    if (!array_key_exists('status', $changeSet)) {
        return;
    }

    // $statusBefore = $changeSet['status'][0];
    // $statusAfter = $changeSet['status'][1];
}