From 10d386ec6a4822402b5ffea46bdd9e7d72db519b Mon Sep 17 00:00:00 2001
From: Tom Christie
Date: Fri, 23 Aug 2013 16:10:20 +0100
Subject: Cleanup and dealing with empty form data.

---
 rest_framework/relations.py | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'rest_framework/relations.py')

diff --git a/rest_framework/relations.py b/rest_framework/relations.py
index 7408758e..3ad16ee5 100644
--- a/rest_framework/relations.py
+++ b/rest_framework/relations.py
@@ -244,6 +244,8 @@ class PrimaryKeyRelatedField(RelatedField):
                 source = self.source or field_name
                 queryset = obj
                 for component in source.split('.'):
+                    if queryset is None:
+                        return []
                     queryset = get_component(queryset, component)
 
             # Forward relationship
-- 
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