Django Rest Framework - 'module' object has no attribute 'HStoreField'

Question

I recently updated a project that was working with Django rest framework 2.4.2 to the newly 3.1 version but now I'm getting a:

'module' object has no attribute 'HStoreField'

That happens to all the endpoints including the "/"

Any suggestions? my Django version is 1.8 and python 2.7.6

Traceback:

Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/

Django Version: 1.8.dev20140910173004
Python Version: 2.7.6
Installed Applications:
('django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest',
'rest_framework',
'geoposition',
'rest_framework_swagger',
'PIL',
'rest_framework.authtoken',
'corsheaders')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware')

Traceback:
File "/Users/marcus/PycharmProjects/django-framework/django-trunk/django/core/handlers/base.py" in get_response
  112.                 resolver_match = resolver.resolve(request.path_info)
File "/Users/marcus/PycharmProjects/django-framework/django-trunk/django/core/urlresolvers.py" in resolve
  362.             for pattern in self.url_patterns:
File "/Users/marcus/PycharmProjects/django-framework/django-trunk/django/core/urlresolvers.py" in url_patterns
  398.         patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/Users/marcus/PycharmProjects/django-framework/django-trunk/django/core/urlresolvers.py" in urlconf_module
  392.             self._urlconf_module = import_module(self.urlconf_name)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py" in import_module
  37.     __import__(name)
File "/Users/marcus/Google Drive/Spring2015/AppContest/MyApplication/Backend/Backend/urls.py" in <module>
  3. from rest_framework import routers
File "/Library/Python/2.7/site-packages/rest_framework/routers.py" in <module>
  23. from rest_framework import views
File "/Library/Python/2.7/site-packages/rest_framework/views.py" in <module>
  91. class APIView(View):
File "/Library/Python/2.7/site-packages/rest_framework/views.py" in APIView
  94.     renderer_classes = api_settings.DEFAULT_RENDERER_CLASSES
File "/Library/Python/2.7/site-packages/rest_framework/settings.py" in __getattr__
  206.             val = perform_import(val, attr)
File "/Library/Python/2.7/site-packages/rest_framework/settings.py" in perform_import
  158.         return [import_from_string(item, setting_name) for item in val]
File "/Library/Python/2.7/site-packages/rest_framework/settings.py" in import_from_string
  170.         module = importlib.import_module(module_path)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py" in import_module
  37.     __import__(name)
File "/Library/Python/2.7/site-packages/rest_framework/renderers.py" in <module>
  20. from rest_framework import exceptions, serializers, status, VERSION
File "/Library/Python/2.7/site-packages/rest_framework/serializers.py" in <module>
  1354.     ModelSerializer.serializer_field_mapping[postgres_fields.HStoreField] = CharMappingField

Exception Type: AttributeError at /
Exception Value: 'module' object has no attribute 'HStoreField'

Answer 1

Installing the latest release candidate of Django 1.8 should fix the issue.

You are running 1.8.dev20140910173004, which already has support for some Postgres fields, but not for HStoreField yet. Django REST framework only checks for the django.contrib.postgres and then assumes that HStoreField is available too. For your version of Django that is not the case.

If pip install -u doesn't get you the latest version, try removing and reinstalling Django.