Custom JSON serializers for a Symfony 3 entity - symfony

Question

I have a Symfony 3.2 entity using Doctrine's Translatable extension.
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;
use Symfony\Component\Serializer\Annotation\Groups;
/**
* Media
*
* #ORM\Table(name="medias")
* #Gedmo\TranslationEntity(class="AppBundle\Entity\Translation\MediaTranslation")
*/
class Media implements Translatable
{
/* [...] */
/**
* #var string|null
*
* #ORM\Column(type="text", nullable=true)
* #Gedmo\Translatable
* #Groups({"single_media"})
*/
private $description;
/* [...] */
}
I know how to use the basic way to serialize this entity in JSON (I use friendsofsymfony/rest-bundle for the serialization of my REST API), but I would like to serialize it in a custom way like this...
{
"description": {
"fr": "description en français",
"en": "english description",
}
}

Answer 1

try this :
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;
use Symfony\Component\Serializer\Annotation\Groups;
/**
* Media
*
* #ORM\Table(name="medias")
* #Gedmo\TranslationEntity(class="AppBundle\Entity\Translation\MediaTranslation")
*/
class Media implements Translatable, \Serializable
{
/* [...] */
/**
* #var string|null
*
* #ORM\Column(type="text", nullable=true)
* #Gedmo\Translatable
* #Groups({"single_media"})
*/
private $description;
/* [...] */
}