From 3d85473edf847ba64aa499b336ca21f6b3d3c6b8 Mon Sep 17 00:00:00 2001
From: Aider Ibragimov
Date: Wed, 18 Feb 2015 21:00:12 +0300
Subject: Fix UniqueTogetherValidator for NULL values

---
 rest_framework/validators.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'rest_framework')

diff --git a/rest_framework/validators.py b/rest_framework/validators.py
index e3719b8d..c030abdb 100644
--- a/rest_framework/validators.py
+++ b/rest_framework/validators.py
@@ -138,7 +138,9 @@ class UniqueTogetherValidator:
         queryset = self.queryset
         queryset = self.filter_queryset(attrs, queryset)
         queryset = self.exclude_current_instance(attrs, queryset)
-        if queryset.exists():
+
+        # Ignore validation if any field is None
+        if None not in attrs.values() and queryset.exists():
             field_names = ', '.join(self.fields)
             raise ValidationError(self.message.format(field_names=field_names))
 
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