public function getCurrentTicketCount()
{
$criteria = new \CDbCriteria();
$criteria->addCondition('queue_assignments.id = (select id from ' . TicketQueueAssignment::model()->tableName() . ' cass where cass.ticket_id = t.id order by cass.assignment_date desc limit 1) and queue_assignments.queue_id = :qid');
$criteria->params = array(':qid' => $this->id);
return Ticket::model()->with('queue_assignments')->count($criteria);
}