On Thu, Feb 19, 2015 at 02:45:43PM +0100, Julien Cigar wrote: > Hello, > > I'm using SQLAlchemy 0.9.8 with PostgreSQL and the reflection feature of > SQLAlchemy. > > I have the following tables (only relevant parts are show): > https://gist.github.com/silenius/390bb9937490730741f2 > > and the "problematic" mapper is the one of my association object: > https://gist.github.com/silenius/1559a7db65ed30a1b079 > > SQLAlchemy complains with the following error: > "sqlalchemy.exc.InvalidRequestError: One or more mappers failed to > initialize - can't proceed with initialization of other mappers. > Original exception was: Could not locate any simple equality expressions > involving locally mapped foreign key columns for primary join condition > 'pool_invite_result.pool_invite_pool_id = pool_invite.pool_id AND > pool_invite.pool_id = pool.id' on relationship PoolAccountResult.pool. > Ensure that referencing columns are associated with a ForeignKey or > ForeignKeyConstraint, or are annotated in the join condition with the > foreign() annotation. To allow comparison operators other than '==', the > relationship can be marked as viewonly=True." > > The problem is that in the PoolAccountResult mapper I want a > relationship to the Pool but the link is made through an intermediate > table (pool_invite) .. > > Any idea how to handle this with SQLAlchemy ? > > Thanks :) > > Julien
... and I'm answering to myself: it seems to work with https://gist.github.com/silenius/e7e59c96a7277fb5879f does it sound right ? > > -- > Julien Cigar > Belgian Biodiversity Platform (http://www.biodiversity.be) > PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 > No trees were killed in the creation of this message. > However, many electrons were terribly inconvenienced. > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy+unsubscr...@googlegroups.com. > To post to this group, send email to sqlalchemy@googlegroups.com. > Visit this group at http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. -- Julien Cigar Belgian Biodiversity Platform (http://www.biodiversity.be) PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 No trees were killed in the creation of this message. However, many electrons were terribly inconvenienced. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
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