+ if list_type == 'audiobooks':
+ audiobook_tag_ids = cache.get('audiobook_tags')
+ if audiobook_tag_ids is None:
+ books_with_audiobook = Book.objects.filter(media__type__in=('mp3', 'ogg'))\
+ .distinct().values_list('pk', flat=True)
+ audiobook_tag_ids = Tag.objects.filter(
+ items__content_type=ct,
+ items__object_id__in=list(books_with_audiobook)).distinct().values_list('pk', flat=True)
+ audiobook_tag_ids = list(audiobook_tag_ids)
+ cache.set('audiobook_tags', audiobook_tag_ids)
+
+ other = other.filter(id__in=audiobook_tag_ids)