SiteSubspecialtyDrug::relations PHP 메소드

    public function relations()
    {
        return array('sites' => array(self::BELONGS_TO, 'Site', 'site_id'), 'subspecialties' => array(self::BELONGS_TO, 'Subspecialty', 'subspecialty_id'), 'drugs' => array(self::BELONGS_TO, 'Drug', 'drug_id'));
    }