I have a table that has two columns that reference the same table in a foreign-key relationship. What do I need to specify and where to avoid the error below?
<class 'sqlalchemy.exceptions.ArgumentError'>: Error determining primary and/or secondary join for relationship 'FeatureLoc.feature (Feature)'. If the underlying error cannot be corrected, you should specify the 'primaryjoin' (and 'secondaryjoin', if there is an association table present) keyword arguments to the relation() function (or for backrefs, by specifying the backref using the backref() function with keyword arguments) to explicitly specify the join conditions. Nested error is "Can't determine join between 'featureloc' and 'feature'; tables have more than one foreign key constraint relationship between them. Please specify the 'onclause' of this join explicitly." I am reflecting these tables from the database: feature_t = Table('feature',metadata,autoload=True) featureloc_t = Table('featureloc',metadata,autoload=True) class Feature(object): pass class FeatureLoc(object): pass sqlalchemy.orm.mapper(Feature,feature_t,properties={ 'elements' : relation(Element,backref='feature') }) sqlalchemy.orm.mapper(FeatureLoc,featureloc_t,properties={ 'srcfeature' : relation(Feature), 'feature' : relation(Feature) }) Thanks, Sean --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---