persist new entity onFlush

Question

I try to user the onFlush Event in Doctrine to persist a new entity, but it leads to an infinite loop when trying to persist. Here is what I do in the Listener:

$countusers = $em->getRepository('DankeForumBundle:NotificationUser')->countNotificationsByDeal($entity);
if ($countusers > 0) {
  $notification = new NotificationAction();
  $notification->setDeal($entity);
  $notification->setDatepost(new \DateTime());
  $notification->setNotificationtype(NotificationAction::TYPE_TOP_DEAL);
  // $em is set to EntityManager
  $em->persist($notification);
  // $uow ist set to UnitOfWork
  $uow->computeChangeSet($em->getClassmetadata('Danke\ForumBundle\Entity\NotificationAction'), $notification);
}

I know that I would get a loop, when I was flushing in the onFlush Event, but I don't do that! I only compute the new change set as it says in the documentation.

Can someone tell where the problem is?

Answer 1

I had similar issues with onFlush Event. Please change

$em->persist($notification);

to

$uow = $em->getUnitOfWork();
$uow->persist($notification);

$metadata = $em->getClassMetadata(get_class($notification));
$uow->computeChangeSet($metadata, $notification);

$uow->persist() will make the UnitOfWork know about the new entity and will schedule it for insertion. Calling $uow->computeChangeSet() is neccessary, to collect the data that should be inserted by Doctrine's persister.