On Jun 11, 2007, at 11:12 AM, Glauco wrote:

>
> This cause a lot of inspiegable problem to property that are perfecly
> functional in the primary
> sqlalchemy.exceptions.ArgumentError: Can't determine relation  
> direction
> for relationship 'Blabla.comune_nascita (Comune)' - foreign key  
> columns
> are present in neither the parent nor the child's mapped tables
>

you need to explicitly specify conditions like primaryjoin,  
foreign_keys, etc.

http://www.sqlalchemy.org/docs/ 
adv_datamapping.html#advdatamapping_properties_customjoin



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