def move_slide(request, slide_id, direction):
slide = get_object_or_404(Slide, pk=slide_id)
slide_to_move_up = None
slide_to_move_down = None
if not ( (direction == 'up' and slide.is_first()) or (direction == 'down' and slide.is_last()) ):
if direction == 'up':
slide_to_move_up = slide
slide_to_move_down = Slide.objects.get(presentation=slide.presentation.id, order_number=slide.order_number-1)
else:
slide_to_move_down = slide
slide_to_move_up = Slide.objects.get(presentation=slide.presentation.id, order_number=slide.order_number+1)
print "slide to move up: %d", slide_to_move_up.id
print "slide to move down: %D", slide_to_move_down.id
Slide.swich_slides_order(slide_to_move_up, slide_to_move_down)
return redirect(slide.presentation.get_details_url())
