/**
  * 显示挂号单
  *
  * @param Request $request
  * @param         $id
  *
  * @return \Illuminate\Http\JsonResponse
  */
 public function show(Request $request, $id)
 {
     $registration = Registration::withTrashed()->find($id);
     if (empty($registration)) {
         return response()->json(['status' => 4, 'message' => '数据异常']);
     }
     if ($registration->user_id != $request->user()->id) {
         return response()->json(['status' => 1, 'message' => '无权限']);
     }
     return $registration;
 }