使用Symfony 4序列化时，仅返回特定组的特定字段

use Symfony\Component\Serializer\Annotation\Groups;

class User
{
    /**
     * @Groups({"public"})
     */
    private $id;

    /**
     * @Groups({"public"})
     */
    private $name;

    /**
     * @Groups({"private"})
     */
    private $email;

    // 其他属性和方法...
}

framework:
    serializer:
        mapping:
            paths:
                - '%kernel.project_dir%/src/Entity'
        enable_annotations: true
        groups:
            public: [public]
            private: [private]

use Symfony\Component\Serializer\SerializerInterface;

class UserController
{
    private $serializer;

    public function __construct(SerializerInterface $serializer)
    {
        $this->serializer = $serializer;
    }

    public function getUser($id)
    {
        $user = $this->getDoctrine()->getRepository(User::class)->find($id);

        $serializedUser = $this->serializer->serialize($user, 'json', ['groups' => 'public']);

        return new JsonResponse($serializedUser);
    }
}