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.
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