Yii2 Slugable Behavior not working


I have this code to enalbe the slugable behaviour to automaticly generate the slugs from the title

but it is not working

what should I do to make it work

in my PostController I have this

public function behaviors()


        return [


                'class' => SluggableBehavior::className(),

                'attribute' => 'title',

                // 'slugAttribute' => 'slug',


            'verbs' => [

                'class' => VerbFilter::className(),

                'actions' => [

                    'delete' => ['post'],





Please help me to make it fixed



SluggableBehavior should be attached to ActiveRecord classes.