如何从 Symfony 中的 url 获取 id [重复]

Question

所以我有一个这样的网址：localhost:8000/answer/create?id=254。

完整的获取方式是：localhost:8000/questions -> localhost:8000/questions/{question_id} -> localhost:8000/answer/create?id=254。

如何让应用将此 id=254 读取为 question_id？

控制器部分：

    /**
     * Create action.
     *
     * @param \Symfony\Component\HttpFoundation\Request $request          HTTP request
     * @param \App\Repository\AnswerRepository          $answerRepository Answer repository
     *
     * @return \Symfony\Component\HttpFoundation\Response HTTP response
     *
     * @throws \Doctrine\ORM\ORMException
     * @throws \Doctrine\ORM\OptimisticLockException
     *
     * @Route(
     *     "/create",
     *     methods={"GET", "POST"},
     *     name="answer_create",
     * )
     */
    public function create(Request $request, AnswerRepository $answerRepository): Response
    {
        $answer = new Answer();
        $form = $this->createForm(AnswerType::class, $answer);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $answerRepository->save($answer);
            $this->addFlash('success', 'answer_created_successfully');

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

        return $this->render(
            'answer/create.html.twig',
            ['form' => $form->createView(),
                'question_id' => $answer, ]
        );
    }

和带表格的模板：

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

{% block title %}
    {{ 'title_answer_create'|trans ({'%id%': answer.id|default('')})}}
{% endblock %}

{% block body %}
    <h1>{{ 'title_answer_create'|trans }}</h1>
    {{ form_start(form, { method: 'POST', action: url('answer_create') }) }}
    {{ form_widget(form) }}
    <div class="form-group row float-sm-right">
        <input type="submit" value="{{ 'action_save'|trans }}" class="btn btn-primary" />
    </div>
    <div class="form-group row float-sm-left">
        <a href="{{ url('question_index') }}" class="btn btn-link">
            {{ 'action_back_to_list'|trans }}
        </a>
    </div>
    {{ form_end(form) }}
{% endblock %}

Answer 1

你为什么不这样用呢？

/**
 * Create action.
 *
 * @param \Symfony\Component\HttpFoundation\Request $request            HTTP request
 * @param \App\Repository\AnswerRepository          $answerRepository   Answer repository
 * @return \Symfony\Component\HttpFoundation\Response HTTP response
 *
 * @throws \Doctrine\ORM\ORMException
 * @throws \Doctrine\ORM\OptimisticLockException
 * @Route(
 *     "/create/{id}",
 *     methods={"GET", "POST"},
 *     name="answer_create",
 * )
 * @Entity("question", expr="repository.find(id)")
 */
public function create(Question $question, Request $request, AnswerRepository $answerRepository): Response
{


    $answer = new Answer();
    $answer->setQuestion($question);

    $form = $this->createForm(AnswerType::class, $answer);
    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {
        $answerRepository->save($answer);
        $this->addFlash('success', 'answer_created_successfully');

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

    return $this->render(
        'answer/create.html.twig',
        ['form' => $form->createView(),
            'question_id' => $answer, ]
    

如果可能 - 您应该将参数命名为 question_id 以明确它是什么。

Answer 2

检查Documentation 以了解您使用的是什么版本的symfony，但您可以通过控制器中的$request 对象访问查询参数。

$question_id = $request->query->get('id');