X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/b2b4f8f39a4b15cbc3b9af7c06f75bbed9a84c88..e6f5f6cdaed0d12bd739d7b2de6dc247d899724d:/src/catalogue/helpers.py

diff --git a/src/catalogue/helpers.py b/src/catalogue/helpers.py
index f74fad3e3..97c63d08c 100644
--- a/src/catalogue/helpers.py
+++ b/src/catalogue/helpers.py
@@ -59,7 +59,7 @@ def update_counters():
     def count_for_book(book, count_by_combination=None, parent_combinations=None):
         if not parent_combinations:
             parent_combinations = set()
-        tags = sorted(tuple(t.pk for t in book.tags.filter(category__in=('author', 'genre', 'epoch', 'kind'))))
+        tags = sorted(book.tags.filter(category__in=('author', 'genre', 'epoch', 'kind')).values_list('pk', flat=True))
         combs = list(combinations(tags))
         for c in combs:
             if c not in parent_combinations: