Element_OphCoTherapyapplication_PatientSuitability::model PHP Method

    public static function model($className = __CLASS__)
    {
        return parent::model($className);
    }

 /**
  * Gets the last drug that was applied for for the given patient, episode and side.
  *
  * @param Patient $patient
  * @param Episode $episode
  * @param string  $side
  *
  * @throws Exception
  *
  * @return OphTrIntravitrealinjection_Treatment_Drug
  */
 public function getLatestApplicationDrug($patient, $episode, $side)
 {
     if ($episode) {
         $event_type = $this->getEventType();
         $criteria = new CDbCriteria();
         $criteria->compare('event.event_type_id', $event_type->id);
         $criteria->compare('event.episode_id', $episode->id);
         $criteria->order = 't.created_date desc';
         $criteria->limit = 1;
         $eye_ids = array('eye_id' => SplitEventTypeElement::BOTH);
         if ($side == 'left') {
             $eye_ids[] = SplitEventTypeElement::LEFT;
         } elseif ($side == 'right') {
             $eye_ids[] = SplitEventTypeElement::RIGHT;
         } else {
             throw new Exception('unrecognised side value ' . $side);
         }
         $criteria->addInCondition('eye_id', $eye_ids);
         if ($suit = Element_OphCoTherapyapplication_PatientSuitability::model()->with('event', $side . '_treatment')->find($criteria)) {
             return $suit->{$side . '_treatment'}->drug;
         }
     }
 }