Update Celery to 4.3

[wolnelektury.git] / src / catalogue / feeds.py

diff --git a/src/catalogue/feeds.py b/src/catalogue/feeds.py
index 2a65c59..f0305e7 100644 (file)
--- a/src/catalogue/feeds.py
+++ b/src/catalogue/feeds.py
@@ -1,10 +1,9 @@
-# -*- coding: utf-8 -*-
 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 from django.contrib.sites.models import Site
 from django.contrib.syndication.views import Feed
-from django.core.urlresolvers import reverse
+from django.urls import reverse
 
 from catalogue import models
 
@@ -52,8 +51,7 @@ class AudiobookFeed(Feed):
         return item.name
 
     def item_categories(self, item):
-        return sorted(set(author.name for author in
-                      item.book.tags.filter(category='author').iterator()))
+        return sorted(item.book.authors().values_list('name', flat=True))
 
     def item_description(self, item):
         lines = []