public function populateByLabOrderId($labOrderId = null) { $db = Zend_Registry::get('dbAdapter'); if ($labOrderId === null) { $labOrderId = $this->lab_order_id; } $sqlSelect = $db->select()->from($this->_table)->where('lab_order_id = ?', (int) $labOrderId)->limit(1); return parent::populateWithSql($sqlSelect->__toString()); }