X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/3badd77f743883992829a1174eef7c8d5e851766..01ba89e7caab3e386df4b1a99a93b98a237a0457:/apps/social/utils.py

diff --git a/apps/social/utils.py b/apps/social/utils.py
index 96f0ca0c7..c6a93537b 100755
--- a/apps/social/utils.py
+++ b/apps/social/utils.py
@@ -1,7 +1,12 @@
+# -*- 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.db.models import Q
-from catalogue.models import Tag
+from catalogue.models import Book, Tag
 from catalogue import utils
 from catalogue.tasks import touch_tag
+from social.models import Cite
 
 
 def likes(user, work):
@@ -32,4 +37,9 @@ def set_sets(user, work, sets):
         touch_tag(shelf)
 
     # delete empty tags
-    Tag.objects.filter(category='set', user=user, book_count=0).delete()
+    Tag.objects.filter(category='set', user=user, items=None).delete()
+
+
+def cites_for_tags(tags):
+    """Returns a QuerySet with all Cites for books with given tags."""
+    return Cite.objects.filter(book__in=Book.tagged.with_all(tags))