/**
  * Deletes an existing Services model.
  * If deletion is successful, the browser will be redirected to the 'index' page.
  * @param integer $id
  * @return mixed
  */
 public function actionDelete($id)
 {
     $model = $this->findModel($id);
     Services::updateAll(['parent_id' => $model->parent_id], 'parent_id=:parent_id', [':parent_id' => $model->id]);
     $model->delete();
     return $this->redirect(['index']);
 }