From 4e035184384db8ed1227fdcb1dad2ea6ddb1cf68 Mon Sep 17 00:00:00 2001
From: Tom Christie
Date: Thu, 13 Nov 2014 23:30:42 +0000
Subject: required=False for nullable relationships

---
 rest_framework/utils/field_mapping.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rest_framework/utils/field_mapping.py b/rest_framework/utils/field_mapping.py
index ce339971..9c187176 100644
--- a/rest_framework/utils/field_mapping.py
+++ b/rest_framework/utils/field_mapping.py
@@ -215,7 +215,7 @@ def get_relation_kwargs(field_name, relation_info):
             # If this field is read-only, then return early.
             # No further keyword arguments are valid.
             return kwargs
-        if model_field.has_default():
+        if model_field.has_default() or model_field.null:
             kwargs['required'] = False
         if model_field.null:
             kwargs['allow_null'] = True
-- 
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