theres no direct support for a set of base classes to be in distinct  
tables.   even though python has multiple inheritance, such a pattern  
represented explicitly within a relational database is not something  
ive ever seen.  you might be able to hack this via mapping to  
selects, or setting up the mappers such that one "base" mapper  
inherits from the other "base" mapper, and the target mapper inherits  
from that.

On Sep 13, 2006, at 7:00 PM, Eric Hawthorne wrote:

> i.e. can you persist an instance of a class that has multiple  
> independent superclasses?
>
> If it is supported, how would one go about specifying a good  
> mapping for this?
>
> Please no debates on merits of multiple inheritance. Python has it,  
> just possibly with good reason,
> so  an ORM claiming to persist python data objects should also  
> support it, IMHO.
>
> I can't readily make out an answer re multiple inheritance support  
> in sqlalchemy from the sqlalchemy website or google searches.
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