Quando tento liberar uma entidade que funcione bem, mas nada preenche meu banco de dados, mas 0 erros ... Existe o meu controlador:

/**
* @Security("is_anonymous() or is_authenticated()")
* @Route("api")
*/
class MessageUserController extends Controller
{
/**
 *
 * @Rest\Post(
 *     path = "/message/user/add",
 *     name = "api_message_add"
 * )
 */
public function UserAddMessageAction(Request $request)
{
    $em = $this->getDoctrine()->getManager();

    $content = ($request->get('content'));
    $user = $em->getRepository('AppBundle:User')->findOneBy(array('id' => ($request->get('id_user'))));
    $token = $request->get('token');
    $friend = $em->getRepository('AppBundle:User')->findOneBy(array('id' => ($request->get('id_friend'))));


    if (!isset($content)) {
        return new JsonResponse([
            'success' => "false",
            'message' => "Message non renseigné"
        ]);
    }

    if (!isset($token)) {
        return new JsonResponse([
            'success' => "false",
            'message' => "Token non renseigné"
        ]);
    }

    if ($user->getToken() != $token) {
        return new JsonResponse([
            'success' => "false",
            'message' => "Bad token",
        ]);
    }

    if (!isset($friend) or !isset($user)) {
        return new JsonResponse([
            'success' => "false",
            'message' => "Message sans propriétaire ou destinataire"
        ]);
    }

    $message = new MessageUser();
    $message->setRead('0');
    $message->setIdReceiver($friend->getId());
    $message->setIdTransmitter($user->getId());
    $message->setContent($content);

    $dm = $this->get('doctrine_mongodb')->getManager();
    $dm->persist($message);
    $dm->flush();

    return new JsonResponse([
        'messages' => $message,
        'success' => "true",
        'message' => "Message ajouté"
    ]);
}

/**
 *
 * @Rest\Post(
 *     path = "/message/user/list",
 *     name = "api_message_list"
 * )
 */
public function UserSeeMessageAction()
{
    $dm = $this->get('doctrine_mongodb')->getManager();
    $messages = $dm->getRepository('AppBundle:MessageUser')->find(1);


    return new JsonResponse([
        'messages' => $messages,
        'success' => "true",
        'message' => "Liste de messages"
    ]);
}
}

Minha entidade:

<?php

namespace AppBundle\Document;

use Doctrine\ODM\MongoDB\Mapping\Annotations as MongoDB;

/**
* @MongoDB\Document()
*/
class MessageUser
{
/**
 * @MongoDB\Id
 */
protected $id;

/**
 * @MongoDB\Field(type="string")
 */
protected $content;

/**
 * @MongoDB\Field(type="timestamp")
 */
protected $sendAt;

/**
 * @MongoDB\Field(type="boolean")
 */
protected $read = '0';

 /**
 * @MongoDB\Field(type="integer")
 */
protected $idTransmitter;

/**
 * @MongoDB\Field(type="integer")
 */
protected $idReceiver;

/**
 * Get id
 *
 * @return id $id
 */
public function getId()
{
    return $this->id;
}

/**
 * Set content
 *
 * @param string $content
 * @return $this
 */
public function setContent($content)
{
    $this->content = $content;
    return $this;
}

/**
 * Get content
 *
 * @return string $content
 */
public function getContent()
{
    return $this->content;
}

/**
 * Set sendAt
 *
 * @param timestamp $sendAt
 * @return $this
 */
public function setSendAt($sendAt)
{
    $this->sendAt = $sendAt;
    return $this;
}

/**
 * Get sendAt
 *
 * @return timestamp $sendAt
 */
public function getSendAt()
{
    return $this->sendAt;
}

/**
 * Set read
 *
 * @param boolean $read
 * @return $this
 */
public function setRead($read)
{
    $this->read = $read;
    return $this;
}

/**
 * Get read
 *
 * @return boolean $read
 */
public function getRead()
{
    return $this->read;
}

/**
 * Set idTransmitter
 *
 * @param integer $idTransmitter
 * @return $this
 */
public function setIdTransmitter($idTransmitter)
{
    $this->idTransmitter = $idTransmitter;
    return $this;
}

/**
 * Get idTransmitter
 *
 * @return integer $idTransmitter
 */
public function getIdTransmitter()
{
    return $this->idTransmitter;
}

/**
 * Set idReceiver
 *
 * @param integer $idReceiver
 * @return $this
 */
public function setIdReceiver($idReceiver)
{
    $this->idReceiver = $idReceiver;
    return $this;
}

/**
 * Get idReceiver
 *
 * @return integer $idReceiver
 */
public function getIdReceiver()
{
    return $this->idReceiver;
}
}

Como se eu fizesse:http: // localhost: **** / api / message / user / add a resposta fica assim:

{"messages": {}, "success": "true", "message": "Message outout"}

Mas se eu procurar no meu banco de dados nada se estiver lá ... Se eu digitar "show dbs" no meu terminal, posso ver meu banco de dados em 0,0000GB

Que erro eu cometi?