$filter->is('aid', '报警模块')->select(Alarm::all()->pluck('title', 'id'));

$filter->is('pid', '物业公司')->select(Property::all()->pluck('name', 'id'))->load('gid', '/admin/getDepartment');
$filter->is('gid', '部门')->select(PropertyDepartment::all()->pluck('name', 'id'));
/*
 * 根据物业公司的id，获取公司的部门信息
 */
public function getDepartment(Request $request){

  $pid = $request->get('q');

  return PropertyDepartment::where('pid','=', $pid)->get(['id', DB::raw('name as text')]);
}