How to check if entity changed in Doctrine 2?

Question

I need to check if a persisted entity has changed and needs to be updated on the database. What I made (and did not work) was the following:

$product = $entityManager->getRepository('Product')->find(3); $product->setName('A different name');  var_export($entityManager->getUnitOfWork()->isScheduledForUpdate($product)); 

That code prints always false, I also tried to flush before check the unit of work, but did not work.

Anyone has a suggestion?

Answer 1

The first thing I'd check it that your setName function is actually doing something ($this-> name = $name...) If it's already working, then you could define an event listener on your services.yml that is triggered when you call the flush.

entity.listener:   class: YourName\YourBundle\EventListener\EntityListener   calls:     - [setContainer,  ["@service_container"]]   tags:     - { name: doctrine.event_listener, event: onFlush } 

Then you define the EntityListener

namespace YourName\YourBundle\EventListener;  use Doctrine\ORM\Event; use Symfony\Component\DependencyInjection\ContainerAware;  class EntityListener extends ContainerAware {         /**      * Gets all the entities to flush      *      * @param Event\OnFlushEventArgs $eventArgs Event args      */     public function onFlush(Event\OnFlushEventArgs $eventArgs)     {            $em = $eventArgs->getEntityManager();         $uow = $em->getUnitOfWork();          //Insertions         foreach ($uow->getScheduledEntityInsertions() as $entity) {             # your code here for the inserted entities         }          //Updates         foreach ($uow->getScheduledEntityUpdates() as $entity) {             # your code here for the updated entities         }          //Deletions         foreach ($uow->getScheduledEntityDeletions() as $entity) {             # your code here for the deleted entities         }     } } 

If you need to know which entities are being changed, but do something with them after they've been saved to the database, just store the entities changed in a private array, an then define a onFlush event that gets the entities from the array.

BTW, to trigger this kind of events you need to add the @ORM\HasLifecycleCallbacks on the entity.