def up(self):
        """
        Move this object up one position.
        """
        self.swap(self.get_ordering_queryset().filter(order__lt=self.order).order_by('-order'))
def up(self):
        """
        Move this object up one position.
        """
        self.swap(self.get_ordering_queryset().filter(order__lt=self.order).order_by('-order'))
def up ( self ) : self . swap ( self . get_ordering_queryset ( ) . filter ( order__lt = self . order ) . order_by ( '-order' ) )
Move this object up one position.
Move this object up one position .