From 803164a993b272dd72860cf5cb5ea1b2464a1aee Mon Sep 17 00:00:00 2001
From: Dan Crosta <dcrosta@gmail.com>
Date: Mon, 11 Jul 2011 08:08:49 -0400
Subject: [PATCH] add unique index on User.username

---
 mongoengine/django/auth.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mongoengine/django/auth.py b/mongoengine/django/auth.py
index 2711ee18..92424909 100644
--- a/mongoengine/django/auth.py
+++ b/mongoengine/django/auth.py
@@ -32,6 +32,12 @@ class User(Document):
     last_login = DateTimeField(default=datetime.datetime.now)
     date_joined = DateTimeField(default=datetime.datetime.now)
 
+    meta = {
+        'indexes': [
+            {'fields': ['username'], 'unique': True}
+        ]
+    }
+
     def __unicode__(self):
         return self.username