function sync_dbid(){
     Event::$per_page = null;
     $events = Event::find()->all();
     foreach($events as $event){
         $target = unserialize($event->target_obj);
         if($target->realm != null && $target->realm->id != $event->target_dbid){
             $event->target_dbid = $target->realm->id;
             echo "missing dbid in event " . $event->id . " - actual: " . $event->target_dbid . " correct: " . $target->realm->id;
             if($event->save())
                 echo " - currected <br>\n";
             else
                 echo " - can't correct <br>\n";
         }
     }
 }