Django Request Session on anonymous users - django

Question

I have the following problem:
I'm using the Django Rest framework with anonymous users (i don't have users in my application) and in my views file when i try to modify the request.session variable, the value is not persistent in all views. I have two different class based views:
def post(self, request):
...
request.session["instances"] = serializer.data
request.session.modified = True
...
return Response(data, status=status.HTTP_200_OK)
def get(self, request, page):
...
print request.session["instances"]
...
return Response(data, status=status.HTTP_200_OK)
On the second view i get a key error, basically the key "instances" doesn't exist. This is my settings file:
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'corsheaders',
]
MIDDLEWARE = [
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'corsheaders.middleware.CorsMiddleware',
]
SESSION_SAVE_EVERY_REQUEST = True
############
# SESSIONS #
############
# Cache to store session data if using the cache session backend.
SESSION_CACHE_ALIAS = 'default'
# Cookie name. This can be whatever you want.
SESSION_COOKIE_NAME = 'sessionid'
# Age of cookie, in seconds (default: 2 weeks).
SESSION_COOKIE_AGE = 60 * 60 * 24 * 7 * 2
# A string like ".example.com", or None for standard domain cookie.
SESSION_COOKIE_DOMAIN = None
# Whether the session cookie should be secure (https:// only).
SESSION_COOKIE_SECURE = False
# The path of the session cookie.
SESSION_COOKIE_PATH = '/'
# Whether to use the non-RFC standard httpOnly flag (IE, FF3+, others)
SESSION_COOKIE_HTTPONLY = True
# Whether a user's session cookie expires when the Web browser is closed.
SESSION_EXPIRE_AT_BROWSER_CLOSE = False
# The module to store session data
SESSION_ENGINE = 'django.contrib.sessions.backends.db'
# Directory to store session files if using the file session module. If None,
# the backend will use a sensible default.
SESSION_FILE_PATH = None
# class to serialize session data
SESSION_SERIALIZER = 'django.contrib.sessions.serializers.JSONSerializer'
#########
# CACHE #
#########
# The cache backends to use.
CACHES = {
'default': {
'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
}
}
CACHE_MIDDLEWARE_KEY_PREFIX = ''
CACHE_MIDDLEWARE_SECONDS = 600
CACHE_MIDDLEWARE_ALIAS = 'default'
I haven't been able to store data on request.session successfully, i tried checking if the session has a session_key but it prints None, so i created a session on the first view with session_id = request.session._get_or_create_session_key() but still on the second view it doesn't exist anymore (session_key is None). Anybody here had this problem before?