2 1个视图中的Model 2 foreach。拉拉韦尔

Question

  

我尝试了嵌套foreach几次。但是我失败了。如何预测数据选择。重复一遍foreach。

控制器

$choices = Choice::where('user_id','=',Auth::id())->get();
$duplicates = Question::selectRaw("count('id') as total, topic_id")->groupBy('topic_id')->get(); 

return view('choices.index',compact('too','choices','duplicates'));

查看

@foreach ($duplicates as $duplicate)
  <tr>
     <td style="text-align: center;">{{ $duplicate->topic->id }}</td>
     <td style="text-align: center;">@foreach ($choices as $choice) {{ $choice->question_number }} @endforeach</td>
 </tr>
@endforeach

我希望结果像

@foreach ($duplicates as $duplicate)
      <tr>
         <td style="text-align: center;">{{ $duplicate->topic->id }}</td>
         <td style="text-align: center;">$choice->question_number }}</td>
     </tr>
@endforeach

  

但无法读取$ choice

Answer 1

在聊天讨论中，似乎Question模型和Choice模型与Topic模型有关系

您需要定义这样的关系

  

主题模型

public function choices(){ 
  return $this->hasMany('App\Choice'); 
}

public function questions(){ 
  return $this->hasMany('App\Question'); 
}

  

问题模型

public function topic(){ 
   return $this->belongsTo('App\Topic'); 
}

  

选择模型

public function topic(){ 
    return $this->belongsTo('App\Topic'); 
}

  

现在获取数据

$duplicates = Question::selectRaw("count('id') as total, topic_id")->with('topic', 'topic.choices')->groupBy('topic_id')->get(); 

  

模板渲染

@foreach ($duplicates as $duplicate)
      <tr>
         <td style="text-align: center;">{{ $duplicate->topic->id }}</td>
         <td style="text-align: center;">
               @foreach ($duplicate->topic->choices as $choice)
                 {{ $choice->question_number }}
               @endforeach
         </td>
     </tr>
@endforeach