Obtain "_id" value using MongoDB backend

[rodrigocollavo]

Inside Cork.py script, when a User() is created, it validates for the "_id" in this line:

if session is not None:
    try:
        self.session_creation_time = session['_creation_time']
        self.session_accessed_time = session['_accessed_time']
        self.session_id = session['_id']
    except:
        pass

session['_id'] is not there, I see the username in the session instead of the _id, and I want that _id for making some DBRef on my collections.

Looking at the code for Cork.py and mongodb_backend.py I don't see anything storing the _id in the session.

Is this a bug or missing implementation?

I can make my own query and ask for the _id using the username, buy it's not very effective.

Thanks