hello, i need to generate a unique number from a table based on the primary key. i used to lock the table (with write) and got what i needed. working with the ORM, though, it seems that session.add(object) functions just as well. at the time of the session.add(), the primary key assigned to the object, which is still in the session, is unique. calling the 'live' object.id get's me what i need - a unique primary key. somehow this seems too good to be true ... what am i missing here?
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