public function postSave(Request $request)
 {
     $post_fields_arr = $request->all();
     if (isset($post_fields_arr['id'])) {
         $widget_model = \App\Models\AttributeModel::find($post_fields_arr['id']);
         if (!$widget_model) {
             return 'Ошибка: нет виджета с таким ID - ' . $post_fields_arr['id'];
         }
         $widget_model->title = $post_fields_arr['name'];
         $widget_model->name = $post_fields_arr['name'];
         $widget_model->attribute_group_id = $post_fields_arr['attribute_group_id'];
         $widget_model->save();
     } else {
         \App\Models\AttributeModel::create($post_fields_arr);
     }
     return redirect('/seller/attribute-group/' . $post_fields_arr['attribute_group_id']);
 }