+ total = 0
+ last_vol = None
+ for b in qs:
+ if last_vol != b.youtube_volume:
+ last_vol = b.youtube_volume
+ total = 0
+ total = b.total = total + b.duration
+ return list(qs)
+
+
+@permission_required('archive.change_audiobook')
+def book_youtube_volume(request, aid):
+ audiobook = get_object_or_404(models.Audiobook, id=aid)
+ slug = audiobook.slug
+ cur_vol = audiobook.youtube_volume
+ new_vol = request.POST.get('volume', '')
+
+ audiobook.youtube_volume = new_vol
+ audiobook.save()
+
+ for a in models.Audiobook.objects.filter(youtube_volume=cur_vol, index__gt=audiobook.index).order_by('index'):
+ if a.youtube_volume != cur_vol:
+ break
+ a.youtube_volume = new_vol
+ a.save()
+
+ return redirect('book', audiobook.slug)
+