book sorting fix

[redakcja.git] / apps / dvcs / models.py

diff --git a/apps/dvcs/models.py b/apps/dvcs/models.py
index 6cfda91..bb79627 100644 (file)
--- a/apps/dvcs/models.py
+++ b/apps/dvcs/models.py
@@ -51,7 +51,7 @@ class Tag(models.Model):
             Returns None for the last stage.
         """
         try:
-            return Tag.objects.filter(ordering__gt=self.ordering)[0]
+            return type(self).objects.filter(ordering__gt=self.ordering)[0]
         except IndexError:
             return None