/**
* 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']);
}