Hi,
I'm facing a small trouble with SF2 and doctrine, the former calling
Collection->clear method when submitting empty multiple entities forms, the
latter taking a snapshot when the clear method is called on
PersistentCollections.
Since I want to perform actions when there are modifications on some
entities, I need to know the changes implied by the collection clear calls.
So I tried something, which is probably a non-sense doctrine wise and prone
to errors, by detaching the collection owner entity, fetching it again from
db, comparing collections and merging the detached entity back in UoW in
the onFlush event. Everything seems fine till UoW tries to persist the
entity. It could be summarized as :
$eventManager->addEventListener(Events::onFlush, function(OnFlushEventArgs
$args) {
$em = $args->getEntityManager();
$uow = $em->getUnitOfWork();
foreach ($uow->getScheduledCollectionDeletions() as $collection) {
if (! $collection->count()) {
$owner = $collection->getOwner();
$uow->detach($owner);
$refOwner = $em->find(get_class($owner), $owner->getId());
// compare $collection and $refOwner's collection
$uow->merge($owner);
}
}
});
I know this is / seems to be tricky, confirmed by the PDO Error Invalid
parameter number : no parameters were bound, but I must find a trick anyway.
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