表格中没有显示Ajax数据？

Question

我有Allocate_classRoom DB表格 ，我想在其中使用ajax显示数据

  function departmentQuery() { var department = $('#department' ).val(); if(department!=" ") { var urls = "{{ URL::to('roomAjax') }}"; var request = $.ajax({ url: urls+"/"+department, type: "GET", dataType: 'json' }); request.done(function(data){ var allRoom =""; for (var i=0; i<data.length;i++) { // room +="<option value=' " +data[i].id+ " ' >"+data[i].name+ "</option>"; allRoom +=" <tr> " + "<td>"+data[i].id+"</td>"+ "<td>"+data[i].course_id+"</td>"+ /*"<td>"+ course->name+"</td>"+*/ "<td>"+data[i].Room_No+"</td>"+ "<td>"+data[i].date+data[i].start_time+data[i].end_time+"</td>"+ "</tr>"; } $("#allRoom").html(allRoom); }); request.fail(function(){ alert('failed to get items for that department'); }); }else { alert('Select Department'); } } 

我正在上传控制器代码

 public function ajaxRoom($id) { $allRoom = AllocateClassroom::where('department_id',$id)- >with('course')->get(); return response()->json($allRoom); } 

.Data从数据库返回，但无法显示我的视图表，请您提出建议。