protected function refreshRelatedStones()
 {
     $relatedStones = $this->relatedStonesArray;
     InteriorStoneRelation::model()->deleteAllByAttributes(array('entity_id' => $this->id, 'entity_name' => 'Interior'));
     if (is_array($relatedStones)) {
         foreach ($relatedStones as $id) {
             if (Stone::model()->exists('t.id = :id', array(':id' => $id))) {
                 $relation = new InteriorStoneRelation();
                 $relation->entity_id = $this->id;
                 $relation->stone_id = $id;
                 $relation->save();
             }
         }
     }
 }