X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/013ec8a416d4ff1ea3e1f2fa9ee2935623197ecd..6280673f35e13e75e81c5b7821bd2a44a1831eab:/apps/catalogue/models/book.py?ds=sidebyside

diff --git a/apps/catalogue/models/book.py b/apps/catalogue/models/book.py
index bfc9ec4f5..5f68e09ff 100644
--- a/apps/catalogue/models/book.py
+++ b/apps/catalogue/models/book.py
@@ -71,7 +71,7 @@ class Book(models.Model):
 
     parent = models.ForeignKey('self', blank=True, null=True,
         related_name='children')
-    ancestor = models.ManyToManyField('self', blank=True, null=True,
+    ancestor = models.ManyToManyField('self', blank=True,
         editable=False, related_name='descendant', symmetrical=False)
 
     objects  = models.Manager()