Laravel：表单数据绑定

Question

情境：

我有一个每个科目的表格，每个科目有三到四个问题，用户必须回答这些问题，然后将数据保存在数据库中

问题：

如何将数据与表单绑定，以便表单重新填充用户之前输入的数据。 我已经尝试了很多并且经常搜索以找到解决方案，但我找不到任何有用的东西。

代码：

控制器：

public function saveData(Request $request, $user_id, $subject_id)
{
    $all_data = $request->input('row');

    foreach ($all_data as $data) {
        $question_id = $data['question_id'];
        $check_data = ['user_id' => $user_id, 'question_id' => $question_id, 'subject_id' => $subject_id];
        $exist_data = RatingDatum::where($check_data)->get()->first();

        if (is_null($exist_data)) {
            RatingDatum::create($data);
        } else {
            $save = RatingDatum::findorfail($exist_data->id);
            $save->update($data);
        }
    }

    flash()->success('Data has been submitted.');

    return 'done';
}

查看：

<div class="row">
    {!! Form::model(['method' => 'PATCH','action'=>['RatingDataController@saveData'],$organisation->id,$organisation->sector->id]) !!}
       <div class=" col-md-9">
           <h3> {{$subject_name->subject}}</h3>
           @foreach($question as $index=>$question)
               <div class="plan bg-plan">
                   <h5>{{$question->question}}</h5>

                   <hr>

                   <!-- create sector form -->
                   @foreach($answers as $answer)
                       <div class="radio">
                           <label> 
                               {!! Form::radio('row['.$index.'][answer_id]', $answer->id,true)!!}                                                        
                               {{$answer->answer}}
                           </label>
                       </div>
                   @endforeach

                   <div class="form-group">
                       {!! Form::label('comment','Comment :') !!}
                       {!! Form::textarea('row['.$index.'][comment]' ,null,['class'=>'form-control', 'rows' => 4]) !!}
                   </div>                             
               </div>
           @endforeach
       </div>
       {!! Form::submit('Submit Data', ['class' => 'btn btn-success submit right']) !!}
    {!! Form::close() !!}
 </div>