Dmitry Krasun Dmitry Krasun - 2 months ago 28
Ajax Question

How to encode Doctrine entities to JSON in Symfony 2.0 AJAX application?

I'm developing game app and using Symfony 2.0. I have many AJAX requests to the backend. And more responses is converting entity to JSON. For example:

class DefaultController extends Controller
public function launchAction()
$user = $this->getDoctrine()

// encode user to json format
$userDataAsJson = $this->encodeUserDataToJson($user);
return array(
'userDataAsJson' => $userDataAsJson

private function encodeUserDataToJson(User $user)
$userData = array(
'id' => $user->getId(),
'profile' => array(
'nickname' => $user->getProfile()->getNickname()

$jsonEncoder = new JsonEncoder();
return $jsonEncoder->encode($userData, $format = 'json');

And all my controllers do the same thing: get an entity and encode some of its fields to JSON. I know that I can use normalizers and encode all entitities. But what if an entity has cycled links to other entity? Or the entities graph is very big? Do you have any suggestions?

I think about some encoding schema for entities... or using
to avoid cycling..,


Another option is to use the JMSSerializerBundle. In your controller you then do

$serializer = $this->container->get('serializer');
$reports = $serializer->serialize($doctrineobject, 'json');
return new Response($reports); // should be $reports as $doctrineobject is not serialized

You can configure how the serialization is done by using annotations in the entity class. See the documentation in the link above. For example, here's how you would exclude linked entities:

* Iddp\RorBundle\Entity\Report
* @ORM\Table()
* @ORM\Entity(repositoryClass="Iddp\RorBundle\Entity\ReportRepository")
* @ExclusionPolicy("None")
* @ORM\ManyToOne(targetEntity="Client", inversedBy="reports")
* @ORM\JoinColumn(name="client_id", referencedColumnName="id")
* @Exclude
protected $client;