Question

索引方法使用Illuminate \ Support \ Facades \ DB;

 class CourseController extends Controller
  {public function indexeli(){
 $all = DB::table('courses')
        ->join('teachers', 'courses.teacher_id', '=', 'teachers.id')
        ->select('courses.*', 'teachers.tchr_name')
        ->get();

    return view('course.aindex',['data'=>$all]);
   }}

我的course.aindex是

<table class="table table-bordered mt-5">
<thead class="">
  <tr>
    <th>Course ID</th>
    <th>Course Name</th>
    <th>Course Type</th>
      <th>Teacher Name</th>
    <th>Edit</th>
    <th>Delete</th>
  </tr>
</thead>
<tbody>

@foreach($data as $x)
<tr>
    <td>{{$x->course_id}}</td>
    <td>{{$x->course_name}}</td>
    <td>{{$x->course_type}}</td>
    <td>{{$x->tchr_name}}</td>

    <td class="pl-5">
    <a href ="{{route('editeli',$x->id)}}" class="btn btn-info ml- 
    2">Edit</a></td>
    <td class="pl-5"><form onsubmit = "return confirm('are you sure you want 
    to delete this info?')" action = "{{route('destroyeli', $x->id)}}" 
      method ="post" class = "d-inline-block">
       {{csrf_field()}}
       {{method_field('delete')}}
       <button type = "submit" class="btn btn-danger">Delete</button>
       </form></td>
  </tr>

上面的连接有一些错误，也许就是为什么表根本不显示意味着没有数据显示但是如果我在索引方法中这样做

  $all = Course::all();
   return view('course.aindex',['data'=>$all]);

然后索引页显示表，但是当我加入表时它不起作用我在fillable中添加了teacher_id。如果我在索引方法中添加dd（$ all），它将向我返回

Collection {#250 ▼
#items: []
}

所以我猜我的加入命令有问题，请帮助

Laravel加入桌子后没有显示

0 个答案: