php - 删除方法 Symfony

Question

尝试创建删除方法后，我遇到了以下错误:

An exception has been thrown during the rendering of a template ("Some mandatory parameters are missing ("id") to generate a URL for route "movie_delete".") in movies/index.html.twig at line 10.

我使用的代码: Twig 模板:

{% extends 'base.html.twig' %}

{% block body %}
    {% if movies|length == 0 %}
        There are no movie items available. Add a movie <a href="{{ path('movie_create_form') }}">here</a> to get started.
    {% elseif movies|length != 0 %}
        These are the results: <br />
        <ul>
            {% for x in movies %}
                <li>Title: {{ x.title }}  - Price: {{ x.price }} - <a href="#">Edit</a> - <a href="{{ path('movie_delete') }}{{ x.id }}"> Delete</a></li>
            {% endfor %}
        </ul>
        <a href="{{ path('movie_create_form') }}">Add more movie entries</a>
    {% endif %}
{% endblock %}

删除类:

<?php

namespace AppBundle\Controller;

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\JsonResponse;

use AppBundle\Entity\Movie;

class MovieDeleteController extends Controller
{

    public function deleteAction($id)
    {
        $em = $this->getDoctrine()->getManager();

        if(!$id)
        {
            throw $this->createNotFoundException('No ID found');
        }

        $movie = $this->getDoctrine()->getEntityManager()->getRepository('AppBundle:Movie')->Find($id);

        if($movie != null)
        {
            $em->remove($movie);
            $em->flush();
        }

        return $this->redirectToRoute('movies');
    }
}

还有我的routing.yml:

movie_delete:
    path:     /movies/delete/{id}
    defaults: { _controller: AppBundle:MovieDelete:delete }

谁能解释我应该如何在 Symfony 中添加 Delete 方法，以便我可以在上面编写的代码中应用更改？

Answer 1

您忘记将“ID”变量传递给 twig 路由。

<a href="{{ path('movie_delete') }}{{ x.id }}"> Delete</a>

应该是

<a href="{{ path('movie_delete', {id: x.id}) }}"> Delete</a>

在您的“movie_delete”路由中，您定义了一个“id”参数。创建此路由需要此参数。在你的 Twig 文件中传递缺少的参数，你就完成了!

如果您也打算在“编辑”路线上工作，请记住您还需要一个“id”参数。确保像使用“删除”路由一样将其传递到您的 Twig 文件中。

参见:This Symfony documentation ，这里解释了 Twig 路由的附加参数。在您的情况下，'slug' 被替换为 'id'。

祝你好运!