我无法在laravel平台上的数据库中记录 我不能保存数据库中的记录，你能帮助我吗？在我错的时候，只有多个选择题和填写空白的问题类型，记录保存在数据库中，然后添加1-2个单词类型的问题，在这个时候，任何数据不保存在数据库中，请帮助我这个

这是控制器代码

public function store(Request $request) {
    //
    $rules = [
    'quiz_id' => 'required',
    'question_type_id' => 'required',
    'question' => 'required|string|max:255',
    'answer' => 'required',
    'question_img' => 'image',
    ];
    
    $validator = Validator::make($request->all(),$rules);
    if($validator->fails()){
        return back()->with('warning','please Fill manadatory fields');
    } else {
        $addquestion = Questions::AddClass($request);
        if($addquestion)
            return redirect('/teachers/dashboard/allquestions')->with('success','Question Created Successfully!');
    }
}

这是模型代码

protected $primary = 'id';
protected $table = 'questions';
protected $fillable = ['quiz_id','question_type_id', 'question', 'a','b','c','d', 'answer',  
'status','created_at','updated_at','question_img','question_video_link'];

public static function AddClass($data) {
    $row = DB::table('questions')->insert([
    'quiz_id' => $data->quiz_id,
    'question_type_id'  => $data->question_type_id,
    'question' =>  $data->question,
    'a' =>  $data->a,
    'b' =>  $data->b,
    'c' =>  $data->c,
    'd' =>  $data->d,
    'answer'=> $data->answer,
    'status'  => 1,
    'created_at'  => date('Y-m-d H:i:s'),
    'updated_at'  => date('Y-m-d H:i:s'),
    'question_img'=> $data->question_img,
    'question_video_link' => $data->question_video_link,
    ]);
    return $row;
}

这是视图代码，在这段代码中，我使用一个jquery函数来显示特定的类型和选项

     @extends('layouts.teacherapp')

     @section('content')
     <style>
     .box{
     display:none;
     }
     </style>


            <!-- ============================================================== -->
            <!-- End Bread crumb and right sidebar toggle -->
            <!-- ============================================================== -->
            <!-- ============================================================== -->
            <!-- Start Page Content -->
            <!-- ============================================================== -->
            @if(Session::has('success'))
            <div class="alert alert-success"> <i class="ti-user"></i> {{ 
            Session::get('success') }}
            <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">&times;</span> </button>
                                    </div>
            @endif                      
            <!-- ============================================================== -->
            <!-- End Bread crumb and right sidebar toggle -->
            <!-- ============================================================== -->
            <!-- ============================================================== -->
            <!-- Start Page Content -->
            <!-- ============================================================== -->
             <div class="page-wrapper">
        <!-- ============================================================== -->
        <!-- Title and breadcrumb -->
        <!-- ============================================================== -->
        <div class="page-titles">
            <div class="d-flex align-items-center">
                <h5 class="font-medium m-b-0">Add Question</h5>
                <div class="custom-breadcrumb ml-auto">
                    <a href="#!" class="breadcrumb">Home</a>
                    <a href="#!" class="breadcrumb">Add Question</a>
                </div>
            </div>
        </div>
        <!-- ============================================================== -->
        <!-- Container fluid scss in scafholding.scss -->
        <!-- ============================================================== -->
        <div class="container-fluid">
            <!-- ============================================================== -->
            <!-- Sales Summery -->
            <!-- ============================================================== -->
            
           
           <div class="row">
                <form class="add-class" action="{{url('/teachers/dashboard/storequestion')}}" enctype="multipart/form-data" method="post">
                {{csrf_field()}}

       
<div class="row">
   <div class="input-field col s12">
        <select name="quiz_id">
            <option value="" disabled selected>Choose Quiz</option>
            @foreach($quiz as $qui)
            
                <option value="{{$qui->id}}">{{$qui->quizname}}</option> 
            
            @endforeach  
        </select>
        <label>Select Quiz</label>
    </div>
</div>
<div class="row">
   <div class="input-field col s12">
        <select name="question_type_id" id="select">
            <option value="" disabled selected>Choose Question Type</option>
            @foreach($question_type as $questy)
                <option value="{{$questy->id}}" >{{$questy->question_type_name}}</option> 
            @endforeach  
        </select>
        <label>Select Question Type</label>
    </div>
</div>
<div id="DivContent">
  <div id="1" class="div_content">
    <div class="row">
       <div class="input-field col s12">
        <input id="question" type="text" name="question">
        <label for="question">Question</label>
        @if ($errors->has('question'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('question') }}</strong>
                </small>
            @endif
       </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <input id="a" type="text" name="a">
        <label for="a">Option A</label>
        @if ($errors->has('a'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('a') }}</strong>
                </small>
            @endif
      </div>
    </div>

    <div class="row">
      <div class="input-field col s12">
        <input id="b" type="text" name="b">
        <label for="b">Option B</label>
        @if ($errors->has('b'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('b') }}</strong>
                </small>
            @endif
      </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <input id="c" type="text" name="c">
        <label for="c">Option C</label>
        @if ($errors->has('c'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('c') }}</strong>
                </small>
            @endif
       </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <input id="d" type="text" name="d">
        <label for="c">Option D</label>
        @if ($errors->has('d'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('d') }}</strong>
                </small>
            @endif
       </div>
     </div>
    <div class="row">
      <div class="input-field col s12">
        <textarea id="answer" name="answer" class="materialize-textarea"></textarea>
        <label for="answer">Answer</label>
      </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <button class="btn cyan waves-effect waves-light right" type="submit">Add Question
        </button>
      </div>
    </div>
  </div>
</div>
<!--fill in the blank part-->
<div id="2" class="div_content">
    <div class="row">
       <div class="input-field col s12">
        <input id="question" type="text" name="question">
        <label for="question">Question</label>
        @if ($errors->has('question'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('question') }}</strong>
                </small>
            @endif
       </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <input id="a" type="text" name="a">
        <label for="a">Option A</label>
        @if ($errors->has('a'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('a') }}</strong>
                </small>
            @endif
      </div>
    </div>

    <div class="row">
      <div class="input-field col s12">
        <input id="b" type="text" name="b">
        <label for="b">Option B</label>
        @if ($errors->has('b'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('b') }}</strong>
                </small>
            @endif
      </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <input id="c" type="text" name="c">
        <label for="c">Option C</label>
        @if ($errors->has('c'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('c') }}</strong>
                </small>
            @endif
       </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <input id="d" type="text" name="d">
        <label for="c">Option D</label>
        @if ($errors->has('d'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('d') }}</strong>
                </small>
            @endif
       </div>
     </div>
    <div class="row">
      <div class="input-field col s12">
        <textarea id="answer" name="answer" class="materialize-textarea"></textarea>
        <label for="answer">Answer</label>
      </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <button class="btn cyan waves-effect waves-light right" type="submit">Add Question
        </button>
      </div>
    </div>
  </div>
  <!--fill in the blank part-->
  <!--1-2 word Answer -->
  <div id="3" class="div_content">
    <div class="row">
       <div class="input-field col s12">
        <input id="question" type="text" name="question">
        <label for="question">Question</label>
        @if ($errors->has('question'))
                <small class="form-control-feedback">
                <strong>{{ $errors->first('question') }}</strong>
                </small>
            @endif
       </div>
    </div>
    
    <div class="row">
      <div class="input-field col s12">
        <textarea id="answer" name="answer" class="materialize-textarea"></textarea>
        <label for="answer">Answer</label>
      </div>
    </div>
    <div class="row">
      <div class="input-field col s12">
        <button class="btn cyan waves-effect waves-light right" type="submit">Add Question
        </button>
      </div>
    </div>
  </div>
  <!--1-2 word Answer -->
 <!--True or False-->
    
  <div id="4" class="div_content">
  <div class="row">
     <div class="input-field col s12">
      <input id="question" type="text" name="question">
      <label for="question">Question</label>
     @if ($errors->has('question'))
    <small class="form-control-feedback">
    <strong>{{ $errors->first('question') }}</strong>
    </small>
  @endif
     </div>
  </div>
  <div class="row">
    <div class="input-field col s12">
      <input id="a" type="text" name="a">
      <label for="a">True</label>
@if ($errors->has('a'))
    <small class="form-control-feedback">
    <strong>{{ $errors->first('a') }}</strong>
    </small>
  @endif
    </div>
  </div>

<div class="row">
    <div class="input-field col s12">
      <input id="b" type="text" name="b">
      <label for="b">False</label>
@if ($errors->has('b'))
    <small class="form-control-feedback">
    <strong>{{ $errors->first('b') }}</strong>
    </small>
  @endif
    </div>
  </div>

  
  <div class="row">
    <div class="input-field col s12">
  <textarea id="answer" name="answer" class="materialize-textarea"></textarea>
  <label for="answer">Answer</label>
</div>
</div>
<div class="row">
    <div class="input-field col s12">
      <button class="btn cyan waves-effect waves-light right" type="submit">Add Question
      </button>
    </div>
  </div>
</div>

<!--True or False-->
</div>
</div>
</form>
</div>
</div>

         <script src="https://code.jquery.com/jquery-3.6.0.js"></script>
         <script>
         $(document).ready(function(){

            //hides dropdown content
             $(".div_content").hide();

            //unhides first option content
             $("#DivContent:first").show();

             //listen to dropdown for change
              $("#select").change(function(){
             //rehide content on change
              $('.div_content').hide();
             //unhides current item
              $('#'+$(this).val()).show();
               });

              });
             </script>    
            <!-- ============================================================== -->
            <!-- End PAge Content -->
            <!-- ============================================================== -->
                            
           @endsection

@extends（'layouts.teacherapp'））
@节（“内容”）
.盒子{
显示：无；
}
@if（会话：：has（'success'））
{{ 
会话：：获取（'success'）}
&时代；
@恩迪夫
添加问题
{{csrf_field（）}}
选择测验
@foreach（$qui）
{{$qui->quizname}
@endforeach
选择测验
选择问题类型
@foreach（$question\u类型为$questy）
{{$questy->question_type_name}
@endforeach
选择问题类型
问题:
@如果（$errors->has（'question'））
{{$errors->first（'question'）}
@恩迪夫
方案A
@如果（$errors->has（'a'））
{{$errors->first（'a'）}
@恩迪夫
方案B
@如果（$errors->has（'b'））
{{$errors->first（'b'）}
@恩迪夫
备选案文C
@如果（$errors->has（'c'））
{{$errors->first（'c'）}
@恩迪夫
方案D
@如果（$errors->has（'d'））
{{$errors->first（'d'）}
@恩迪夫
答复
添加问题
问题:
@如果（$errors->has（'question'））
{{$errors->first（'question'）}
@恩迪夫
方案A
@如果（$errors->has（'a'））
{{$errors->first（'a'）}
@恩迪夫
方案B
@如果（$errors->has（'b'））
{{$errors->first（'b'）}
@恩迪夫
备选案文C
@如果（$errors->has（'c'））
{{$errors->first（'c'）}
@恩迪夫
方案D
@如果（$errors->has（'d'））
{{$errors->first（'d'）}
@恩迪夫
答复
添加问题
问题:
@如果（$errors->has（'question'））
{{$errors->first（'question'）}
@恩迪夫
答复
添加问题
问题:
@如果（$errors->has（'question'））
{{$errors->first（'question'）}
@恩迪夫
真的
@如果（$errors->has（'a'））
{{$errors->first（'a'）}
@恩迪夫
假的
@如果（$errors->has（'b'））
{{$errors->first（'b'）}
@恩迪夫
答复
添加问题
$（文档）.ready（函数（）{
//隐藏下拉列表内容
$（“.div_content”）.hide（）；
//取消隐藏第一个选项内容
$（“#DivContent:first”）.show（）；
//收听下拉列表以了解变化
$（“#选择”）.change（函数（）{
//根据变化重新编排内容
$（'.div_content'）.hide（）；
//取消隐藏当前项目
$（'#'+$（this.val（））.show（）；
});
});
@端部

您必须使用模式对象而不是

DB:：table（）

。你必须调试

$row

内部

addClass（）

方法是return

1

或

0

或

null

。你能给我一些新的解释吗？我不知道laravel必须这样做。检查URL。