ajax在laravel中獲取請求時發生500內部服務器錯誤？

Question

in route file

Route::get('griev_reg_form/assembly/{district_id}', 'GrievanceRegisterController@assembly'); 

In controller

public function assembly($id){ 
    $assemblyConstituency = AssemblyConstituency::where('dis_code', '=', $id)->orderBy(3)->get(); 
     $options = array(); 

     foreach ($assemblyConstituency as $assembly) { 
      $options += array($assembly->ac_code => $assembly->ac_name); 
     } 

     return Response::json($options); 
    } 

鑑於文件

$("#district").change(function() { 
      $.getJSON("griev_reg_form/assembly/" + $("#district").val(), function(data) { 
       var $assembly = $("#ac_problem"); 
       $assembly.empty(); 
       $.each(data, function(index, value) { 
        $assembly.append('<option value="' + index +'">' + value + '</option>'); 
       }); 
      // $("#station_id").trigger("change"); /* trigger next drop down list not in the example */ 
      }); 
     }); 

when i change the select box there is error name "HTTP500: SERVER ERROR - The server encountered an unexpected condition that prevented it from fulfilling the request."

Answer 1

這是因爲我沒有在控制器

use Response;