From dcc8d22cec6d59392c8470a9325d0d8fedc6d4fa Mon Sep 17 00:00:00 2001
From: Mircea Pasoi <mircea.pasoi@gmail.com>
Date: Tue, 24 Aug 2010 16:22:56 -0700
Subject: [PATCH] Proper unique index name when using db_field.

---
 mongoengine/base.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mongoengine/base.py b/mongoengine/base.py
index 9505d416..92a450de 100644
--- a/mongoengine/base.py
+++ b/mongoengine/base.py
@@ -269,7 +269,7 @@ class TopLevelDocumentMetaclass(DocumentMetaclass):
             # Generate a list of indexes needed by uniqueness constraints
             if field.unique:
                 field.required = True
-                unique_fields = [field_name]
+                unique_fields = [field.db_field]
 
                 # Add any unique_with fields to the back of the index spec
                 if field.unique_with: