Julien Cigar <jci...@ulb.ac.be> wrote:
> On Thu, Feb 19, 2015 at 11:31:10AM -0500, Michael Bayer wrote: >> Julien Cigar <jci...@ulb.ac.be> wrote: >> >>> 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 ? >> >> Sure. Also, you could use automap which does figure these out in simple >> cases: http://docs.sqlalchemy.org/en/rel_0_9/orm/extensions/automap.html > > always with this, any idea why SQLAlchemy inserts NULL and > NULL for my two relationship (line 51-79) instead of the pool_obj and > dup.owner ids (line 89-90), https://dpaste.de/1Trz ..? getting a 404 on that link. > > Thanks, > Julien > > >>>> -- >>>> 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. >> >> -- >> 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. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. 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