django-facebook is not JSON serializable

django-facebook is not JSON serializable

I've been developing a django web-app, and I have to allow users to log in
using Facebook. In order to get this done I tried using django-facebook. I
simply followed their installation instructions but every time I try to
log-in with facebook I get the following error:
TypeError at /facebook/connect/
<open_facebook.api.OpenFacebook object at 0x7fb9311648d0> is not JSON
serializable
I've tried searching for all of the django-facebook related issues on
StackOverflow, and even rummaged through the issues on their GitHub repo,
but I couldn't find anything similar to my problem. I've also tried
searching for generic "object is not JSON serializable" questions, but I'm
not really sure how I would be able to apply any of those solutions since
the error seems to be happening in the django-facebook code.
Here's the full traceback:

Environment:
Request Method: POST
Request URL: http://foodtrip.ph/facebook/connect/?facebook_login=1
Django Version: 1.5.4
Python Version: 2.7.3
Installed Applications:
('django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.admin',
'pinax_theme_bootstrap',
'django_forms_bootstrap',
'autocomplete_light',
'django_facebook',
'foodtrips')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django_facebook.middleware.FacebookCanvasMiddleWare')
Traceback:
File
"/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py"
in get_response
115. response = callback(request,
*callback_args, **callback_kwargs)
File
"/usr/local/lib/python2.7/dist-packages/django/views/decorators/csrf.py"
in wrapped_view
77. return view_func(*args, **kwargs)
File
"/usr/local/lib/python2.7/dist-packages/django_facebook/decorators.py"
in wrapped_view
98. response = self.authenticate(self.fn, request,
*args, **kwargs)
File
"/usr/local/lib/python2.7/dist-packages/django_facebook/decorators.py"
in authenticate
178. fn, request, graph=graph, *args, **kwargs)
File
"/usr/local/lib/python2.7/dist-packages/django_facebook/decorators.py"
in execute_view
137. result = view_func(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django_facebook/views.py"
in connect
40. response = _connect(request, graph)
File "/usr/local/lib/python2.7/dist-packages/django_facebook/views.py"
in _connect
81. request, connect_facebook=connect_facebook)
File
"/usr/local/lib/python2.7/dist-packages/django_facebook/connect.py" in
connect_user
82. user = _login_user(request, converter, auth_user,
update=update)
File
"/usr/local/lib/python2.7/dist-packages/django_facebook/connect.py" in
_login_user
110. login(request, authenticated_user)
File
"/usr/local/lib/python2.7/dist-packages/django/contrib/auth/__init__.py"
in login
91. request.session.cycle_key()
File
"/usr/local/lib/python2.7/dist-packages/django/contrib/sessions/backends/base.py"
in cycle_key
271. self.create()
File
"/usr/local/lib/python2.7/dist-packages/django/contrib/sessions/backends/db.py"
in create
34. self.save(must_create=True)
File
"/usr/local/lib/python2.7/dist-packages/django/contrib/sessions/backends/db.py"
in save
51.
session_data=self.encode(self._get_session(no_load=must_create)),
File
"/usr/local/lib/python2.7/dist-packages/django/contrib/sessions/backends/base.py"
in encode
84. serialized = self.serializer().dumps(session_dict)
File "/usr/local/lib/python2.7/dist-packages/django/core/signing.py"
in dumps
100. return json.dumps(obj, separators=(',',
':')).encode('latin-1')
File "/usr/lib/python2.7/json/__init__.py" in dumps
238. **kw).encode(obj)
File "/usr/lib/python2.7/json/encoder.py" in encode
201. chunks = self.iterencode(o, _one_shot=True)
File "/usr/lib/python2.7/json/encoder.py" in iterencode
264. return _iterencode(o, 0)
File "/usr/lib/python2.7/json/encoder.py" in default
178. raise TypeError(repr(o) + " is not JSON serializable")
Exception Type: TypeError at /facebook/connect/
Exception Value: is not JSON serializable
The settings file:

# Django settings for foodtripph project.
import os
PROJECT_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__),
os.pardir))
PACKAGE_ROOT = os.path.abspath(os.path.dirname(__file__))
try:
DB_PASS = os.environ["DB_PASS"]
except KeyError:
error_msg = 'Please set the "DB_PASS" environment variable'
raise ImproperlyConfigured(error_msg)
try:
FACEBOOK_APP_ID = os.environ["FACEBOOK_APP_ID"]
except KeyError:
error_msg = 'Please set the "FACEBOOK_APP_ID" environment variable'
raise ImproperlyConfigured(error_msg)
try:
FACEBOOK_APP_SECRET = os.environ["FACEBOOK_APP_SECRET"]
except KeyError:
error_msg = 'Please set the "FACEBOOK_APP_SECRET" environment
variable'
raise ImproperlyConfigured(error_msg)
try:
SECRET_KEY = os.environ["SECRET_KEY"]
except KeyError:
error_msg = 'Please set the "SECRET_KEY" environment variable'
raise ImproperlyConfigured(error_msg)
DEBUG = True
TEMPLATE_DEBUG = DEBUG
ADMINS = (
# ('Your Name', 'your_email@example.com'),
)
MANAGERS = ADMINS
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2', # Add
'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
'NAME': 'dev', # Or path to database file
if using sqlite3.
# The following settings are not used with sqlite3:
'USER': 'ubuntu',
'PASSWORD': DB_PASS,
'HOST': 'localhost', # Empty for
localhost through domain sockets or '127.0.0.1' for localhost
through TCP.
'PORT': '', # Set to empty string for
default.
}
}
# Hosts/domain names that are valid for this site; required if DEBUG
is False
# See https://docs.djangoproject.com/en/1.5/ref/settings/#allowed-hosts
ALLOWED_HOSTS = ['.foodtrip.ph', '.foodtrip.ph.', '.facebook.com',
'.facebook.com.']
# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# although not all choices may be available on all operating systems.
# In a Windows environment this must be set to your system time zone.
TIME_ZONE = 'Asia/Manila'
# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html
LANGUAGE_CODE = 'en-us'
SITE_ID = 1
# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True
# If you set this to False, Django will not format dates, numbers and
# calendars according to the current locale.
USE_L10N = True
# If you set this to False, Django will not use timezone-aware datetimes.
USE_TZ = True
# Absolute filesystem path to the directory that will hold
user-uploaded files.
# Example: "/var/www/example.com/media/"
MEDIA_ROOT = os.path.join(PROJECT_ROOT, "site_media", "uploads")
# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash.
# Examples: "http://example.com/media/", "http://media.example.com/"
MEDIA_URL = "/media/"
# Absolute path to the directory static files should be collected to.
# Don't put anything in this directory yourself; store your static files
# in apps' "static/" subdirectories and in STATICFILES_DIRS.
# Example: "/var/www/example.com/static/"
STATIC_ROOT = os.path.join(PROJECT_ROOT, "site_media", "static")
# URL prefix for static files.
# Example: "http://example.com/static/", "http://static.example.com/"
STATIC_URL = "/static/"
# Additional locations of static files
STATICFILES_DIRS = [
]
# List of finder classes that know how to find static files in
# various locations.
STATICFILES_FINDERS = (
'django.contrib.staticfiles.finders.FileSystemFinder',
'django.contrib.staticfiles.finders.AppDirectoriesFinder',
# 'django.contrib.staticfiles.finders.DefaultStorageFinder',
)
# List of callables that know how to import templates from various
sources.
TEMPLATE_LOADERS = (
'django.template.loaders.filesystem.Loader',
'django.template.loaders.app_directories.Loader',
# 'django.template.loaders.eggs.Loader',
)
TEMPLATE_CONTEXT_PROCESSORS = [
'django.contrib.auth.context_processors.auth',
'django.core.context_processors.debug',
'django.core.context_processors.i18n',
'django.core.context_processors.media',
'django.core.context_processors.static',
'django.core.context_processors.tz',
'django.core.context_processors.request',
'django.contrib.messages.context_processors.messages',
#external
# 'account.context_processors.account',
'pinax_theme_bootstrap.context_processors.theme',
'django_facebook.context_processors.facebook',
]
MIDDLEWARE_CLASSES = (
'django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django_facebook.middleware.FacebookCanvasMiddleWare',
# 'account.middleware.LocaleMiddleware',
# 'account.middleware.TimezoneMiddleware',
# Uncomment the next line for simple clickjacking protection:
# 'django.middleware.clickjacking.XFrameOptionsMiddleware',
)
ROOT_URLCONF = 'foodtripph.urls'
# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'foodtripph.wsgi.application'
TEMPLATE_DIRS = [
os.path.join(PROJECT_ROOT, 'site_media', 'templates'),
]
INSTALLED_APPS = (
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
# Uncomment the next line to enable the admin:
'django.contrib.admin',
# Uncomment the next line to enable admin documentation:
# 'django.contrib.admindocs',
#theme
'pinax_theme_bootstrap',
'django_forms_bootstrap',
#external
# 'account',
'autocomplete_light',
'django_facebook',
#project
'foodtrips',
)
SESSION_SERIALIZER = 'django.contrib.sessions.serializers.JSONSerializer'
# A sample logging configuration. The only tangible logging
# performed by this configuration is to send an email to
# the site admins on every HTTP 500 error when DEBUG=False.
# See http://docs.djangoproject.com/en/dev/topics/logging for
# more details on how to customize your logging configuration.
LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'filters': {
'require_debug_false': {
'()': 'django.utils.log.RequireDebugFalse'
}
},
'handlers': {
'mail_admins': {
'level': 'ERROR',
'filters': ['require_debug_false'],
'class': 'django.utils.log.AdminEmailHandler'
}
},
'loggers': {
'django.request': {
'handlers': ['mail_admins'],
'level': 'ERROR',
'propagate': True,
},
}
}
AUTH_USER_MODEL = 'django_facebook.FacebookCustomUser'
AUTHENTICATION_BACKENDS = (
'django_facebook.auth_backends.FacebookBackend',
'django.contrib.auth.backends.ModelBackend',
)
urls.py

from django.conf import settings
from django.conf.urls import patterns, include, url
from django.conf.urls.static import static
from django.contrib import admin, auth
from django.views.generic import TemplateView
import autocomplete_light
autocomplete_light.autodiscover()
admin.autodiscover()
urlpatterns = patterns('',
#static pages
url(r'^$', TemplateView.as_view(template_name='homepage.html'),
name='home'),
# apps
url(r'^foodtrips', include('foodtrips.urls', namespace='foodtrips')),
#account
# url(r'^account/', include('account.urls')),
url(r'^facebook/', include('django_facebook.urls')),
url(r'^accounts/', include('django_facebook.auth_urls')),
# autocomplete
url(r'^autocomplete/', include('autocomplete_light.urls')),
# admin
url(r'^admin/', include(admin.site.urls)),
)
urlpatterns += static(settings.MEDIA_URL,
document_root=settings.MEDIA_ROOT)
I have absolutely no idea how to go about fixing this problem. Any help is
greatly appreciated (and needed)!