Add ModelWithFieldAttributes *before* PolyModel, so that everything does not
become a "ModelWithFieldAttributes" in the Datastore.
The way PolyModel works, each Model class hierarchy is stored in the Datastore
as the class that directly inherited from PolyModel. So, we do not want to
insert ModelWithFieldAttributes *after* PolyModel by inheriting *from*
PolyModel, or everything would just be a ModelWithFieldAttributes in the
Datastore, instead of Person, Work, Group, etc.
class LazyUser(object):
def __get__(self, request, obj_type=None):
if not hasattr(request, '_cached_user'):
from django.contrib.auth import get_user
request._cached_user = get_user(request)
return request._cached_user
class AuthenticationMiddleware(object):
def process_request(self, request):
assert hasattr(request, 'session'), "The Django authentication middleware requires session middleware to be installed. Edit your MIDDLEWARE_CLASSES setting to insert 'django.contrib.sessions.middleware.SessionMiddleware'."
request.__class__.user = LazyUser()
return None