I was looking at the source code of SessionMiddleware:
class SessionMiddleware(object):
def process_request(self, request):
engine = import_module(settings.SESSION_ENGINE)
session_key =
request.COOKIES.get(settings.SESSION_COOKIE_NAME, None)
request.session = engine.SessionStore(session_key)
If I understand it correctly, for every request
SessionMiddleware.process_request() will get the sessionid from the
cookie and then create a new SessionStore instance using that
sessionid.
And when I looked at the source for __init__() of SessionStore and
SessionBase:
class SessionStore(SessionBase):
def __init__(self, session_key=None):
super(SessionStore, self).__init__(session_key)
class SessionBase(object):
def __init__(self, session_key=None):
self._session_key = session_key
self.accessed = False
self.modified = False
So basically SessionStore just creates a new instance without trying
to look up in the database to see whether that session already exists
or not. But shouldn't that be the whole point of session -- for every
request Django needs to look up in the session database to see if the
session is already there? I'm guess at someplace this database lookup
takes place but I can't find it.
Can you tell me where can i find it? Or did I misunderstand how
session work in Django?
Thanks
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