Lance Edgar wrote:
- do objects end up in session.dirty as a result of attributes being
set or changed?
Setting an attribute is enough for the instance to wind up in
Session.dirty, according to
http://www.sqlalchemy.org/docs/reference/orm/sessions.html#sqlalchemy.orm.session.Session.dirty
Indeed.
I'm assuming if you need to know which attributes have changed then
you'll have to examine the instance's state a little closer yourself,
looking at the instrumented history for each attribute, etc. I've not
done this though so I'm afraid that's a guess.
This turns out to be my friend:
http://www.sqlalchemy.org/docs/reference/orm/mapping.html?highlight=instancestate#sqlalchemy.orm.attributes.get_history
...hence the later question about History obejcts ;-)
Chris
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