App:使用symfony 4的@Param转换器注释找不到Post对象

Question

我想通过id或slug发布文章，使用ParamConverter，但我发现App：Post object not found by the @ParamConverter annotation.knowing，我是symfony的初学者，我接受了一次培训。

我试过路线http://127.0.0.1:8000/blog/post/1

BlogController.php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\Routing\Annotation\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
use Symfony\Component\HttpFoundation\Request;
use App\Entity\Post;
/**
 * @Route("/blog")
*/
class BlogController extends AbstractController {

    /**
    * @Route("/post/{id}", requirements={ "id" : "\d+" }, name="get_one_post_by_id", methods={"GET"})
    * @ParamConverter("post", class="App:Post")
    */
    public function postById($post){
        return $this->json($post);
    }
    /**
    * @Route("/post/{slug}", methods={"GET"})
    * @ParamConverter("post", class="App:Post", options={"mapping": {"slug": "slug"}})
    */
    public function postBySlug($post){
        return $this->json($post);  
    }
    /**
    * @Route("/post/{id}", name="delete-post", methods={"DELETE"})
    */
    public function destroy(Post $post){
        $em = $this->getDoctrine()->getManager();
        $em->remove($post);
        $em->flush();
        return $this->json(null, 204);
    }

Answer 1

看起来应该是：

use App\Entity\Post;

    /**
    * @Route("/post/{id}", requirements={ "id" : "\d+" }, name="get_one_post_by_id", methods={"GET"})
    */
    public function postById(Post $post){
        return $this->json($post);
    }

就这样