I've found out that the session file is always updated
(Session._try_store_in_file) if I access auth.user_groups. When the user is
logged in I'm iterating through auth.user_groups which modifies the session.
I've the following code:
if auth.user_id:
for role in auth.user_groups.itervalues():
...
when auth.user_groups.itervalues is called (or auth.user_groups.iteritems)
the session is changed. The reason is the pickled session (in
Session._unchanged) is different, although I've got no clue how this can
happen. I always thought itervalues does not change the dict.
I've made this small test:
if auth.user_id:
import cPickle as pickle
session_pickled1 = pickle.dumps(session, pickle.HIGHEST_PROTOCOL)
for role in auth.user_groups.itervalues():
continue
session_pickled2 = pickle.dumps(session, pickle.HIGHEST_PROTOCOL)
eq = (session_pickled1 == session_pickled2)
where eq is always False once auth.user_groups contains at least one item.
Is there any explanation for this?
Alex
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