From 76cbb668437267e41ed840b1177e6af8cda4f2c4 Mon Sep 17 00:00:00 2001
From: Alistair Roche <roche.a@gmail.com>
Date: Thu, 28 Apr 2011 14:31:19 +0100
Subject: [PATCH] Fixed error with _lookup_field

It was failing when given multiple fields
---
 mongoengine/queryset.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mongoengine/queryset.py b/mongoengine/queryset.py
index 9f24dea5..e2273620 100644
--- a/mongoengine/queryset.py
+++ b/mongoengine/queryset.py
@@ -522,6 +522,7 @@ class QuerySet(object):
                     raise InvalidQueryError('Cannot resolve field "%s"'
                                             % field_name)
             fields.append(field)
+            field = None
         return fields
 
     @classmethod