public function init() { parent::init(); if ($this->modelClass === null) { $this->modelClass = City::className(); } if ($this->modelRegionClass === null) { $this->modelRegionClass = Region::className(); } }
public function getCities() { return $this->hasMany(City::className(), ['country_id' => 'id'])->orderBy(['name' => SORT_ASC]); }