Made note stronger re: race condition

Refs #478
2012-05-09 12:13:42 +01:00
parent eb54037b66
commit 5c4b33e8e6
1 changed files with 3 additions and 1 deletions
--- a/mongoengine/queryset.py
+++ b/mongoengine/queryset.py
@@ -794,7 +794,9 @@ class QuerySet(object):
        keyword argument called :attr:`defaults`.

        .. note:: This requires two separate operations and therefore a
-        potential race condition exists.
+        race condition exists.  Because there are no transactions in mongoDB
+        other approaches should be investigated, to ensure you don't
+        accidently duplicate data when using this method.

        :param write_options: optional extra keyword arguments used if we
            have to create a new document.