Symfony Serializer: Deserialize with relation - php

Question

I test the serializer component and try to do the following.
I have an Article entity:
class Article
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=50)
*/
private $title;
/**
* #ORM\Column(type="text")
*/
private $content;
/**
* #ORM\OneToMany(targetEntity=Comment::class, mappedBy="article", orphanRemoval=true, cascade={"persist"})
*/
private $comments;
//getter/setter...
and a Comment entity :
class Comment
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=50)
*/
private $title;
/**
* #ORM\Column(type="text")
*/
private $content;
/**
* #ORM\ManyToOne(targetEntity=Article::class, inversedBy="comments", cascade={ "persist" })
* #ORM\JoinColumn(nullable=false)
*/
private $article;
//getter/setter...
When a send a json to the controller:
{
"title": "My comment",
"content": "This is a comment",
"article": {
"id": 1
}
}
Article with id 1 exists
I would like the relationship with Article to be deserialized:
#[Route('', name: "comment_create", methods: ['POST'])]
public function create(Request $request): JsonResponse
{
$comment = $this->serializer->deserialize($request->getContent(), Comment::class, 'json');
// $this->entityManager->persist($comment);
// $this->entityManager->flush();
return $this->json($comment, Response::HTTP_CREATED);
}
but the article is not linked.
{"id":null,"title":"My comment","content":"This is a comment","article":{"id":null,"title":null,"content":null,"comments":[]}}
Where is my mistake ? Can the symfony serializer do this ?

Answer 1

Try to use following for deserialization:
$comment = $this->serializer->deserialize($request->getContent(), 'App\Entity\Comment', 'json');