I'm sorry this is the method I've been trying to use
def previous(request, picture_id):
artist_id =
Picture.objects.select_related().get(id=picture_id).artist_id
try:
previous_picture_id =
Picture.objects.filter(artist__id__exact=artist_id).filter(id__lt=picture_id)[0].id
except IndexError:
previous_picture_id =
Picture.objects.filter(artist__id__exact=artist_id).order_by("-id")[0].id
picture = get_object_or_404(Picture, pk=previous_picture_id)
return render_to_response('artists/picture.html', {'picture': picture})
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