On Jul 4, 2011, at 12:47 PM, Michael Tils wrote:
> Hello,
>
> thanks for your help.
>
> The joins Building.condition and Building.care_level are pointing the same
> table. The table is a single-inheritance construct.
>
> The query:
>
> session.query(Building).join(rating, Building.condition).join(care_level,
> Building.care_level)
>
> produces this error:
>
> sqlalchemy.exc.ArgumentError: Can't determine join between 'building' and
> '%(34604496 lookup)s'; tables have more than one foreign key constraint
> relationship between them. Please specify the 'onclause' of this join
> explicitly.
>
> This error can be fixed via string property names:
>
> session.query(Building).join('care_level').join('rating')
>
> This works, but with this method i have no alias names.
that doesn't sound right, can you provide mappings please
>
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