From 470f557a87dafc8d051a494ad9203429bd175d05 Mon Sep 17 00:00:00 2001
From: Francis Reyes <francis.mark.reyes@gmail.com>
Date: Mon, 8 Jul 2013 16:37:40 +1000
Subject: [PATCH] Create failing test for issue #949

---
 rest_framework/tests/models.py          |  5 +++++
 rest_framework/tests/test_serializer.py | 14 +++++++++++++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/rest_framework/tests/models.py b/rest_framework/tests/models.py
index 1598ecd94..a79ddafe3 100644
--- a/rest_framework/tests/models.py
+++ b/rest_framework/tests/models.py
@@ -60,6 +60,11 @@ class ReadOnlyManyToManyModel(RESTFrameworkModel):
     rel = models.ManyToManyField(Anchor)
 
 
+class OptionalDateTimeModel(RESTFrameworkModel):
+    text = models.CharField(max_length=100)
+    date_read = models.DateTimeField(null=True)
+
+
 # Model for regression test for #285
 
 class Comment(RESTFrameworkModel):
diff --git a/rest_framework/tests/test_serializer.py b/rest_framework/tests/test_serializer.py
index 38acc3540..7b5c85d0d 100644
--- a/rest_framework/tests/test_serializer.py
+++ b/rest_framework/tests/test_serializer.py
@@ -7,7 +7,7 @@ from django.utils.translation import ugettext_lazy as _
 from rest_framework import serializers, fields, relations
 from rest_framework.tests.models import (HasPositiveIntegerAsChoice, Album, ActionItem, Anchor, BasicModel,
     BlankFieldModel, BlogPost, BlogPostComment, Book, CallableDefaultValueModel, DefaultValueModel,
-    ManyToManyModel, Person, ReadOnlyManyToManyModel, Photo, RESTFrameworkModel)
+    ManyToManyModel, Person, ReadOnlyManyToManyModel, Photo, OptionalDateTimeModel, RESTFrameworkModel)
 from rest_framework.tests.models import BasicModelSerializer
 import datetime
 import pickle
@@ -129,6 +129,14 @@ class PositiveIntegerAsChoiceSerializer(serializers.ModelSerializer):
         fields = ['some_integer']
 
 
+class OptionalDateTimeSerializer(serializers.ModelSerializer):
+    date_read = serializers.DateTimeField(source='date_read', required=False)
+
+    class Meta:
+        model = OptionalDateTimeModel
+        fields = ['text', 'date_read']
+
+
 class BasicTests(TestCase):
     def setUp(self):
         self.comment = Comment(
@@ -547,6 +555,10 @@ class ModelValidationTests(TestCase):
         self.assertTrue(photo_serializer.is_valid())
         self.assertTrue(photo_serializer.save())
 
+    def test_datetime_with_partial(self):
+        serializer = OptionalDateTimeSerializer(data={'text': 'blah', 'date_read': None}, partial=True)
+        self.assertEquals(True, serializer.is_valid())
+
 
 class RegexValidationTest(TestCase):
     def test_create_failed(self):