Need help to catch "cart_id" based on session.

Hi,

I am using doorsale repo for building ecommerce site due to it's simplicity but I am stuck at the error while trying to catch cart session ID.

The repo link is:

https://github.com/mysteryjeans/doorsale

Error traceback is below:


Request Method: POST
Request URL: http://localhost:8000/sales/checkout/order/

Django Version: 1.9.11
Python Version: 2.7.12
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'doorsale',
 'doorsale.geo',
 'doorsale.pages',
 'doorsale.accounts',
 'doorsale.catalog',
 'doorsale.sales',
 'doorsale.financial',
 'doorsale.payments',
 'sorl.thumbnail',
 'pipeline')
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 "/home/osboxes/Desktop/doorsaleproj/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  149.                     response = self.process_exception_by_middleware(e, request)

File "/home/osboxes/Desktop/doorsaleproj/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  147.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/home/osboxes/Desktop/doorsaleproj/local/lib/python2.7/site-packages/django/utils/decorators.py" in inner
  184.                     return func(*args, **kwargs)

File "/home/osboxes/Desktop/doorsaleproj/local/lib/python2.7/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/home/osboxes/Desktop/doorsaleproj/local/lib/python2.7/site-packages/django/views/generic/base.py" in dispatch
  88.         return handler(request, *args, **kwargs)

File "/home/osboxes/Desktop/doorsaleproj/local/lib/python2.7/site-packages/doorsale/sales/views.py" in post
  351.             cart_id = request.session['cart_id']

File "/home/osboxes/Desktop/doorsaleproj/local/lib/python2.7/site-packages/django/contrib/sessions/backends/base.py" in __getitem__
  50.         return self._session[key]

Exception Type: KeyError

Please advice.

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