Is it possible to hint at sqla the order in which it should write out 
changes to the DB?

I am having issues in which I add two new objects to a session, a and b 
where a depends on b, but sqla is flushing a before b leading to an fk 
issue. I can solve this a few ways: explicitly calling flush after adding 
b, or changing the fk constraint to be initially deferred. Ideally I would 
not have to do either of these.

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SQLAlchemy - 
The Python SQL Toolkit and Object Relational Mapper

http://www.sqlalchemy.org/

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