/**
  * @return \yii\db\ActiveQuery
  */
 public function getActor()
 {
     return $this->hasOne(\giiant\sakila\models\Actor::className(), ['actor_id' => 'actor_id']);
 }
 /**
  * @return \yii\db\ActiveQuery
  */
 public function getActors()
 {
     return $this->hasMany(\giiant\sakila\models\Actor::className(), ['actor_id' => 'actor_id'])->viaTable('film_actor', ['film_id' => 'film_id']);
 }