From a5fe3de330a3c7e8b112c5f1107cbbe383ea5efd Mon Sep 17 00:00:00 2001
From: funkybob <curtis@tinbrain.net>
Date: Tue, 21 Jan 2014 09:19:54 +1100
Subject: [PATCH] Deal with Django <1.7 using SortedDict wherein keys() is a
 generator, not a view

---
 model_utils/managers.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/model_utils/managers.py b/model_utils/managers.py
index 28410d3..93d6d48 100644
--- a/model_utils/managers.py
+++ b/model_utils/managers.py
@@ -70,7 +70,7 @@ class InheritanceQuerySet(QuerySet):
     def iterator(self):
         iter = super(InheritanceQuerySet, self).iterator()
         if getattr(self, 'subclasses', False):
-            extras = self.query.extra.keys()
+            extras = tuple(self.query.extra.keys())
             # sort the subclass names longest first,
             # so with 'a' and 'a__b' it goes as deep as possible
             subclasses = sorted(self.subclasses, key=len, reverse=True)