setValue bug on Form\Element\ObjectSelect about doctrinemodule HOT 7 CLOSED

        /**
         * @ORM\Id
         * @ORM\Column(type="integer",unique=true);
         * @ORM\GeneratedValue(strategy="AUTO")
        */
        protected $id;

$this->add(array(
            'name' => 'location_id',
            'type' => 'DoctrineORMModule\Form\Element\DoctrineEntity',
            'options' => array(
                'label' => 'Location',
                'object_manager' => $em,
                'target_class'   => '\StadEnNatuur\Entity\Location',
                'property'       => 'name'
            ),
        ));

class User
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer", name="id")
     * @ORM\GeneratedValue
     */
    protected $id;
...
    /**
     * @ORM\OneToOne(targetEntity="Country")
     * @ORM\JoinColumn(name="country_id", referencedColumnName="id", nullable=true)
     */
    protected $country;
...

    /**
     * @return Application\Entity\Country
     */
    public function getCountry()
    {
        return $this->country;
    }
...
}

class Country
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer", name="id", nullable=false)
     * @ORM\GeneratedValue
     */
    protected $id;

    /**
     * @ORM\Column(type="string", name="name", nullable=true)
     */
    protected $name;
}

$user = $entityManager->getRepository('Application\Entity\User')->find(1);
$country = $entityManager->getRepository('Application\Entity\Country')->find(2);
$metadata = $entityManager->getClassMetadata(get_class($country));
$countryId = $metadata->getIdentifierValues($country);
var_dump($countryId); // array(0) {}

$user = $entityManager->getRepository('Application\Entity\User')->find(1);
$country = $user ->getCountry();
$metadata = $entityManager->getClassMetadata(get_class($country));
$countryId = $metadata->getIdentifierValues($country);
var_dump($countryId); // array(0) {}

$country = $entityManager->getRepository('Application\Entity\Country')->find(1);
$metadata = $entityManager->getClassMetadata(get_class($country));
$countryId = $metadata->getIdentifierValues($country);
var_dump($countryId); // array(1) {["id"] => int(1)}