15 files changed, 31 insertions, 25 deletions

diff --git a/rest_framework/compat.py b/rest_framework/compat.py
index d4901437..86952fb8 100644
--- a/rest_framework/compat.py
+++ b/rest_framework/compat.py
@@ -5,6 +5,12 @@ versions of django/python, and compatibility wrappers around optional packages.
 # flake8: noqa
 import django
 
+# location of patterns, url, include changes in 1.4 onwards
+try:
+    from django.conf.urls import patterns, url, include
+except:
+    from django.conf.urls.defaults import patterns, url, include
+
 # django-filter is optional
 try:
     import django_filters
diff --git a/rest_framework/tests/authentication.py b/rest_framework/tests/authentication.py
index d498ae3e..838e081b 100644
--- a/rest_framework/tests/authentication.py
+++ b/rest_framework/tests/authentication.py
@@ -1,15 +1,13 @@
-from django.conf.urls.defaults import patterns
 from django.contrib.auth.models import User
+from django.http import HttpResponse
 from django.test import Client, TestCase
-
 from django.utils import simplejson as json
-from django.http import HttpResponse
 
-from rest_framework.views import APIView
 from rest_framework import permissions
-
 from rest_framework.authtoken.models import Token
 from rest_framework.authentication import TokenAuthentication
+from rest_framework.compat import patterns
+from rest_framework.views import APIView
 
 import base64
 
diff --git a/rest_framework/tests/breadcrumbs.py b/rest_framework/tests/breadcrumbs.py
index 647ab96d..df891683 100644
--- a/rest_framework/tests/breadcrumbs.py
+++ b/rest_framework/tests/breadcrumbs.py
@@ -1,5 +1,5 @@
-from django.conf.urls.defaults import patterns, url
 from django.test import TestCase
+from rest_framework.compat import patterns, url
 from rest_framework.utils.breadcrumbs import get_breadcrumbs
 from rest_framework.views import APIView
 
diff --git a/rest_framework/tests/decorators.py b/rest_framework/tests/decorators.py
index 41864d71..8079c8cb 100644
--- a/rest_framework/tests/decorators.py
+++ b/rest_framework/tests/decorators.py
@@ -1,7 +1,7 @@
 from django.test import TestCase
+from django.test.client import RequestFactory
 from rest_framework import status
 from rest_framework.response import Response
-from django.test.client import RequestFactory
 from rest_framework.renderers import JSONRenderer
 from rest_framework.parsers import JSONParser
 from rest_framework.authentication import BasicAuthentication
diff --git a/rest_framework/tests/htmlrenderer.py b/rest_framework/tests/htmlrenderer.py
index 4caed59e..54096206 100644
--- a/rest_framework/tests/htmlrenderer.py
+++ b/rest_framework/tests/htmlrenderer.py
@@ -1,9 +1,9 @@
 from django.core.exceptions import PermissionDenied
-from django.conf.urls.defaults import patterns, url
 from django.http import Http404
 from django.test import TestCase
 from django.template import TemplateDoesNotExist, Template
 import django.template.loader
+from rest_framework.compat import patterns, url
 from rest_framework.decorators import api_view, renderer_classes
 from rest_framework.renderers import TemplateHTMLRenderer
 from rest_framework.response import Response
diff --git a/rest_framework/tests/hyperlink_relations.py b/rest_framework/tests/hyperlink_relations.py
index 8f023873..9e8ecf70 100644
--- a/rest_framework/tests/hyperlink_relations.py
+++ b/rest_framework/tests/hyperlink_relations.py
@@ -1,7 +1,7 @@
-from django.conf.urls import patterns, url
 from django.db import models
 from django.test import TestCase
 from rest_framework import serializers
+from rest_framework.compat import patterns, url
 
 
 def dummy_view(request, pk):
diff --git a/rest_framework/tests/hyperlinkedserializers.py b/rest_framework/tests/hyperlinkedserializers.py
index 24bf61bf..ee4d8e57 100644
--- a/rest_framework/tests/hyperlinkedserializers.py
+++ b/rest_framework/tests/hyperlinkedserializers.py
@@ -1,8 +1,8 @@
-from django.conf.urls.defaults import patterns, url
 from django.test import TestCase
 from django.test.client import RequestFactory
 from django.utils import simplejson as json
 from rest_framework import generics, status, serializers
+from rest_framework.compat import patterns, url
 from rest_framework.tests.models import Anchor, BasicModel, ManyToManyModel, BlogPost, BlogPostComment, Album, Photo, OptionalRelationModel
 
 factory = RequestFactory()
diff --git a/rest_framework/tests/models.py b/rest_framework/tests/models.py
index 1b1def30..0759650a 100644
--- a/rest_framework/tests/models.py
+++ b/rest_framework/tests/models.py
@@ -52,9 +52,10 @@ class RESTFrameworkModel(models.Model):
 
 
 class HasPositiveIntegerAsChoice(RESTFrameworkModel):
-    some_choices = ((1,'A'),(2,'B'),(3,'C'))
+    some_choices = ((1, 'A'), (2, 'B'), (3, 'C'))
     some_integer = models.PositiveIntegerField(choices=some_choices)
 
+
 class Anchor(RESTFrameworkModel):
     text = models.CharField(max_length=100, default='anchor')
 
@@ -164,7 +165,7 @@ class Photo(RESTFrameworkModel):
 
 # Model for issue #324
 class BlankFieldModel(RESTFrameworkModel):
-    title = models.CharField(max_length=100, blank=True, null=True)
+    title = models.CharField(max_length=100, blank=True, null=False)
 
 
 # Model for issue #380
diff --git a/rest_framework/tests/renderers.py b/rest_framework/tests/renderers.py
index fb843676..c1b4e624 100644
--- a/rest_framework/tests/renderers.py
+++ b/rest_framework/tests/renderers.py
@@ -1,13 +1,12 @@
 import pickle
 import re
 
-from django.conf.urls.defaults import patterns, url, include
 from django.core.cache import cache
 from django.test import TestCase
 from django.test.client import RequestFactory
 
 from rest_framework import status, permissions
-from rest_framework.compat import yaml
+from rest_framework.compat import yaml, patterns, url, include
 from rest_framework.response import Response
 from rest_framework.views import APIView
 from rest_framework.renderers import BaseRenderer, JSONRenderer, YAMLRenderer, \
diff --git a/rest_framework/tests/request.py b/rest_framework/tests/request.py
index 2850992d..2eb34cea 100644
--- a/rest_framework/tests/request.py
+++ b/rest_framework/tests/request.py
@@ -1,16 +1,15 @@
 """
 Tests for content parsing, and form-overloaded content parsing.
 """
-from django.conf.urls.defaults import patterns
 from django.contrib.auth.models import User
 from django.contrib.auth import authenticate, login, logout
 from django.contrib.sessions.middleware import SessionMiddleware
 from django.test import TestCase, Client
+from django.test.client import RequestFactory
 from django.utils import simplejson as json
-
 from rest_framework import status
 from rest_framework.authentication import SessionAuthentication
-from django.test.client import RequestFactory
+from rest_framework.compat import patterns
 from rest_framework.parsers import (
     BaseParser,
     FormParser,
diff --git a/rest_framework/tests/response.py b/rest_framework/tests/response.py
index d7b75450..875f4d42 100644
--- a/rest_framework/tests/response.py
+++ b/rest_framework/tests/response.py
@@ -1,8 +1,5 @@
-import unittest
-
-from django.conf.urls.defaults import patterns, url, include
 from django.test import TestCase
-
+from rest_framework.compat import patterns, url, include
 from rest_framework.response import Response
 from rest_framework.views import APIView
 from rest_framework import status
diff --git a/rest_framework/tests/reverse.py b/rest_framework/tests/reverse.py
index fd9a7d64..8c86e1fb 100644
--- a/rest_framework/tests/reverse.py
+++ b/rest_framework/tests/reverse.py
@@ -1,6 +1,6 @@
-from django.conf.urls.defaults import patterns, url
 from django.test import TestCase
 from django.test.client import RequestFactory
+from rest_framework.compat import patterns, url
 from rest_framework.reverse import reverse
 
 factory = RequestFactory()
diff --git a/rest_framework/tests/serializer.py b/rest_framework/tests/serializer.py
index 7f2c27b0..6ea4b424 100644
--- a/rest_framework/tests/serializer.py
+++ b/rest_framework/tests/serializer.py
@@ -699,6 +699,10 @@ class BlankFieldTests(TestCase):
         serializer = self.model_serializer_class(data=self.data)
         self.assertEquals(serializer.is_valid(), True)
 
+    def test_create_model_null_field(self):
+        serializer = self.model_serializer_class(data={'title': None})
+        self.assertEquals(serializer.is_valid(), True)
+
     def test_create_not_blank_field(self):
         """
         Test to ensure blank data in a field not marked as blank=True
diff --git a/rest_framework/tests/testcases.py b/rest_framework/tests/testcases.py
index c90224aa..97f492ff 100644
--- a/rest_framework/tests/testcases.py
+++ b/rest_framework/tests/testcases.py
@@ -6,6 +6,7 @@ from django.test import TestCase
 
 NO_SETTING = ('!', None)
 
+
 class TestSettingsManager(object):
     """
     A class which can modify some Django settings temporarily for a
@@ -19,7 +20,7 @@ class TestSettingsManager(object):
         self._original_settings = {}
 
     def set(self, **kwargs):
-        for k,v in kwargs.iteritems():
+        for k, v in kwargs.iteritems():
             self._original_settings.setdefault(k, getattr(settings, k,
                                                           NO_SETTING))
             setattr(settings, k, v)
@@ -31,7 +32,7 @@ class TestSettingsManager(object):
         call_command('syncdb', verbosity=0)
 
     def revert(self):
-        for k,v in self._original_settings.iteritems():
+        for k, v in self._original_settings.iteritems():
             if v == NO_SETTING:
                 delattr(settings, k)
             else:
@@ -57,6 +58,7 @@ class SettingsTestCase(TestCase):
     def tearDown(self):
         self.settings_manager.revert()
 
+
 class TestModelsTestCase(SettingsTestCase):
     def setUp(self, *args, **kwargs):
         installed_apps = tuple(settings.INSTALLED_APPS) + ('rest_framework.tests',)
diff --git a/rest_framework/urls.py b/rest_framework/urls.py
index bcdc23e7..fbe4bc07 100644
--- a/rest_framework/urls.py
+++ b/rest_framework/urls.py
@@ -12,7 +12,7 @@ your authentication settings include `SessionAuthentication`.
         url(r'^auth', include('rest_framework.urls', namespace='rest_framework'))
     )
 """
-from django.conf.urls.defaults import patterns, url
+from rest_framework.compat import patterns, url
 
 
 template_name = {'template_name': 'rest_framework/login.html'}