Middleware Authentication and 'get_and_delete_messages'

[sahid]

Hello,

i use a native django in appengine
i have create a authentication middleware in django,.
I am inspired by contrib

{{{
class LazyUser (object):
  def __get__ (self, request, obj_type = None):
    if not hasattr (request, '_cached_user'):
      from common import user
      request.__cached_user = user.get_user_from_request (request)
    return request.__cached_user

class AuthenticationMiddleware (object):
  def process_request (self, request):
    request.__class__.user = LazyUser ()

}}}

and in settings.py
{{{
#
Middlewares
MIDDLEWARE_CLASSES = (
  'middleware.auth.AuthenticationMiddleware',
)

}}}

but i have this error :
{{{
  AttributeError at /
  'NoneType' object has no attribute 'get_and_delete_messages'

}}}

I have checked in google, but i don't have really understand the
problem.
You have an idea for resolve this ?

i have tested with beta django

Thanks of lots
~sahid

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