public function actionIndex()
 {
     $model = new Record();
     if ($model->load(Yii::$app->request->post()) && $model->save()) {
         return $this->redirect('site/list');
     } else {
         $data = $model->departmentInfo();
         //if max count boys, we doesnt display department
         $department = [];
         foreach ($data as $key => $item) {
             if ($item['boys_count'] != $item['max_boys']) {
                 $department[$key] = $item['name'];
             }
         }
         return $this->render('index', ['model' => $model, 'data' => $data, 'department' => $department]);
     }
 }