[soc2010/query-refactor] MongoDB backend can now update saved objects.

git-svn-id: http://code.djangoproject.com/svn/django/branches/soc2010/query-refactor@13340 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 2 insertions, 0 deletions

diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index 0c9b603609..d6da57b467 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -215,6 +215,8 @@ class Field(object):
         # mapped to one of the built-in Django field types. In this case, you
         # can implement db_type() instead of get_internal_type() to specify
         # exactly which wacky database column type you want to use.
+        if not getattr(connection.features, "typed_columns", True):
+            return None
         data = DictWrapper(self.__dict__, connection.ops.quote_name, "qn_")
         try:
             return connection.creation.data_types[self.get_internal_type()] % data