/**
* Deletes an existing Category model.
* If deletion is successful, the browser will be redirected to the 'index' page.
* @param integer $id
* @return mixed
*/
public function actionDelete($id)
{
if (Yii::$app->user->can('admin')) {
$this->findModel($id)->delete();
return $this->redirect(['index']);
} else {
return parent::actionLogin();
}
}