public function before_insert(Orm\Model $obj)
	{
		if ($obj instanceof Orm\Model_Temporal)
		{
			if ($obj->{$obj->temporal_property('end_column')} !== $obj->temporal_property('max_timestamp')) {
				return false;
			}
		}

		if ($user_id = \Auth::get_user_id())
		{
			$obj->{$this->_property} = $user_id[1];
		}
	}