如何打印每个主题的评论？ [英] How to print comments for every topic?

问题描述

我有2个表主题和注释：在注释表中，有一个名为topic_id的列，其中id是数字，它对应于用户注释的主题。我在主题控件中列出了以下功能的主题详细信息：

  / ** 
 * @Route（/主题/ {id}，name =topic_details）
 * @param $ id 
 * @return \Symfony\Component\HttpFoundation\Response 
 * / 
 public function topicDetailsAction（$ id）
 {
 $ topic = $ this-> getDoctrine（） - > getRepository（'AppBundle：Topic'） - > find（$ id）; 
 
 return $ this-> render（'topics / topic.details.html.twig'，array（
'topic'=> $ topic 
））; 
} 
  

现在尝试使用此功能显示当前所选主题的注释CommentController：

  / ** 
 * @Route（/ topic / {id}，name = topic_details）
 * @return \Symfony\Component\HttpFoundation\Response 
 * / 
 public function listCommentsAction（$ id）
 {
 $ topic = $ this-> getDoctrine（） - > getRepository（'AppBundle：Topic'） - > find（$ id）; 
 $ topicComments = $ topic-> getComments（）; 
 
 return $ this-> render（'topics / topic.details.html.twig'，array（
'topicComments'=> $ topicComments 
））; 
 
} 
  

毕竟，当我尝试打印所有的数据在twig中的具体主题，我得到以下异常：

变量topicComments不存在。
我确定问题不大，可以解决，但不知道我错过了什么。
这是我的树枝模板：

  {％extends'base.html.twig '％} 
 
 {％block body％} 
< div class =container> 
< div class =panel panel-primary> 
< div class =panel-heading> 
< h3 class =panel-title>< a href =/ topic / {{topic.id}}> {{topic.title}}< / a> H3> 
< / div> 
< br> 
< div class =container> 
< h3>说明：< / h3> 
< div class =well> 
< div class =panel-body> 
 {{topic.description}} 
< / div> 
< / div> 
< / div> 
< hr> 
< div class =panel-body> 
< div class =well> 
< b> 
类别：{{topic.category}}< br> 
创建：{{topic.dateCreated | date（m / d / Y H：i：s）}} 
< / b> 
< / div> 
< / div> 
< / div> 
< div class =container> 
< div class =panel panel-primary> 
< div class =panel-body> 
 
< / div> 
< / div> 
< / div> 
< a href =/ {{topic.id}} / comment / addclass =btn btn-lg btn-default>发表评论< / a> 
< / div> 
< div class =container> 
 {％在topicComments中评论％} 
 {{comment.description}} 
 {％endfor％} 
< / div> 
 {％endblock％} 
  

解决方案

继续传递主题变量实例并导航树枝中的关系，因此渲染控制器：

  return $ this-> render （'topics / topic.details.html.twig'，array（
'topic'=> $ topic 
））; 
  

然后在模板中：

  {％在topic.comments中的评论％} 
 {{comment.description}} 
 {％endfor％} 
  / pre> 
I have 2 tables topics and comments: In the comments table a have column named topic_id where the id is the number, which corresponds to the commented topic from the user. I list the topic details with the following function in the TopicController:
 /**
     * @Route("/topic/{id}", name="topic_details")
     * @param $id
     * @return \Symfony\Component\HttpFoundation\Response
     */
    public function topicDetailsAction($id)
    {
        $topic = $this->getDoctrine()->getRepository('AppBundle:Topic')->find($id);

        return $this->render('topics/topic.details.html.twig', array(
            'topic' => $topic
        ));
    }
Now im trying to display the comments for the current selected topic with this function in the CommentController:
     /**
     * @Route("/topic/{id}", name="topic_details")
     * @return \Symfony\Component\HttpFoundation\Response
     */
    public function listCommentsAction($id)
    {
        $topic = $this->getDoctrine()->getRepository('AppBundle:Topic')->find($id);
        $topicComments = $topic->getComments();

        return $this->render('topics/topic.details.html.twig', array(
            'topicComments' => $topicComments
        ));

    }
After all, when i try to print all the data from specific topic in the twig, i got the following exception:

  
Variable "topicComments" does not exist.
  Im sure the problem isn't big and can be solved, but not sure what i'm missing.
  Here's my twig template:


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

{% block body %}
    <div class="container">
        <div class="panel panel-primary">
            <div class="panel-heading">
                <h3 class="panel-title"><a href="/topic/{{ topic.id }}">{{ topic.title }}</a></h3>
            </div>
            <br>
            <div class="container">
                <h3>Description:</h3>
           <div class="well">
               <div class="panel-body">
                        {{ topic.description }}
                   </div>
               </div>
           </div>
            <hr>
            <div class="panel-body">
                <div class="well">
                    <b>
                        Category: {{ topic.category }} <br>
                        Created: {{ topic.dateCreated|date("m/d/Y  H:i:s") }}
                    </b>
                </div>
            </div>
        </div>
    <div class="container">
        <div class="panel panel-primary">
            <div class="panel-body">

            </div>
        </div>
    </div>
        <a href="/{{ topic.id }}/comment/add" class="btn btn-lg btn-default">Leave a Comment</a>
    </div>
    <div class="container">
        {% for comment in topicComments %}
            {{ comment.description }}
        {% endfor %}
    </div>
{% endblock %}

解决方案
You could continue passing the topic variable instance and navigate the relation in the twig, so render the controller:
    return $this->render('topics/topic.details.html.twig', array(
        'topic' => $topic
    ));
Then in the template:
   {% for comment in topic.comments %}
        {{ comment.description }}
    {% endfor %}


                        
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