From a6465186fde91b15b294f7e7aa0b2ce5a7c02c2b Mon Sep 17 00:00:00 2001
From: rolandkal <rolandka@live.com>
Date: Sun, 13 Apr 2014 03:16:22 +0100
Subject: [PATCH] Added null value for list.

If "many" enabled on PrimaryKeyRelatedField, it ignores required=True
---
 rest_framework/relations.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rest_framework/relations.py b/rest_framework/relations.py
index 3463954dc..f55f92bb5 100644
--- a/rest_framework/relations.py
+++ b/rest_framework/relations.py
@@ -33,7 +33,7 @@ class RelatedField(WritableField):
     many_widget = widgets.SelectMultiple
     form_field_class = forms.ChoiceField
     many_form_field_class = forms.MultipleChoiceField
-    null_values = (None, '', 'None')
+    null_values = (None, '', 'None',[])
 
     cache_choices = False
     empty_label = None