public function relations()
{
// NOTE: you may need to adjust the relation name and the related
// class name for the relations automatically generated below.
return array('cataract' => array(self::HAS_ONE, 'Element_OphTrOperationnote_Cataract', 'cataract_id'), 'complication' => array(self::BELONGS_TO, 'OphTrOperationnote_CataractComplications', 'complication_id'));
}