final public function updateNotNull() {
	
		$class		= get_called_class();
		$binds		= $class::getBinds();
		$properties	= array();
		
		foreach ($binds as $objProp => $dbField) {
				
			if (!is_null($this->$objProp))  {
				$properties[] = $objProp;
			}
				
		}
		
		$ret = $this->update($properties);
		
		return $ret;

	}