Detach and serialize doctrine entities - php

Question

My question is referenced to Doctrine many-to-many relations and onFlush event
Author entitiy: http://pastebin.com/GBCaSA4Z
Book entity: http://pastebin.com/Xb2SEiaQ
I run this code:
$book = new \App\CoreBundle\Entity\Books();
$book->setTtile('book title: '.uniqid());
$book->setIsbn('book isbn: '.uniqid());
$author = new \App\CoreBundle\Entity\Authors();
$author->setName('author title: '.uniqid());
$author->addBook($book);
$entityManager->persist($author);
$entityManager->flush();
In this way all is OK.
Doctrine generate three queries: create author, create book and create links at author_books.
But I need to detach and serialize all entities at doctrine onFlush event and save them at NoSQL database. And then other script will unserialize all these entities and save them to database. And in this way Doctrine generate only two SQL queries: create book and create author. What should I do to doctrine also generate SQL query for linking table?
Here part of the script that unserialize entities:
foreach ($serializedEntities as $serializedEntity)
{
$detachedEtity = unserialize($serializedEntity);
$entity = $entityManager->merge($detachedEtity);
//$entityManager->persist($entity)
}
$entityManager->flush();
UPDATE: and I always get error like this:
Notice: Undefined index: 000000002289c17b000000003937ebb0 in /app/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 2776

Answer 1

You can define a behavior of each entity with inherited class like :
class FieldRepository extends EntityRepository{
define all specific methods
}
so each entity will be saved as defined on class
You can use also the helpers concepts, this will solve your problem faster and easy
OnFlush ---> dispache event 'onFlush' --> define behavior on the helper class

Answer 2

Just a helper class exemple
// Helper book class
class Booking{
public function __construct($container)
{
$this->container = $container;
$this->club_interval = $container->get('X.interval');
$this->security_context = $container->get('security.context');
// your entity manager
$this->em = $container->get('doctrine.orm.entity_manager');
$this->session = $container->get('session');
$this->translator = $container->get('translator');
$this->event_dispatcher = $container->get('event_dispatcher');
$this->price = 0;
}
public function serialize()
{
$this->session->set('booking', serialize($this->booking));
}
public function unserialize()
{
$b = unserialize($this->session->get('booking'));
$partner = null;
foreach ($b->getUsers() as $u) {
$partner = $this->em->getReference('X:User', $u->getId());;
}
$field = $this->em->getReference('X:Field', $b->getField()->getId());
$user = $this->em->getReference('X:User', $b->getUser()->getId());
$this->buildBooking($field, $b->getFirstDate(), $b->getEndDate(), $user, $partner, $b->getGuest());
}
///////////////////////////////////////////////
// here you can choose your database manager check __constructor
////////////////////////////////////////////
public function save(){
$this->em->persist($this->booking);
$this->em->flush();
if ($this->booking->getStatus() >= \X\BookingBundle\Entity\Booking::CONFIRMED) {
$event = new \X\BookingBundle\Event\FilterBookingEvent($this->booking);
$this->event_dispatcher->dispatch(\X\BookingBundle\Event\Events::onBookingConfirm, $event);
}
$this->em->flush();
return $this->booking;
}
so you can trigger this class method directly form you Symfony2 controller, use save() instead of persist()
or using event dispatcher but more tricky
if (false === $this->get('security.context')->isGranted('ROLE_USER')) {
throw new AccessDeniedException();
}
$b = $this->get('X_helper.booking');
$b->unserialize();
$b->setStatus(\X\BookingBundle\Entity\Booking::PENDING);
/////////////////////////////////////
// here use helper's method save instead of flush
$b->save();
return $this->redirect($this->generateUrl(' route '));