mapper() has a selectable= argument, go read about it. 
it can do just about anything u fancy.

> Is there a way to create object mappers with "bean managed
> persistence", as the Java folks would call it? What I would like to
> do is to map a class to a Selectable such as a join. Now when an
> object is created, its attributes should be inserted into several
> tables. Likewise, updates or deletes of objects should spread over
> several tables. For this to happen, I think I would need to hook
> into the ORM.
>
> Any ideas? I'm afraid that this is connected with the VIEWs on the
> sqlalchemy todo list.
>
> Best regards,
> Klaus
>

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