Hello:
When I use the foreign_keys argument to the relation function in the
mapper of SA, I get the following error:
ArgumentError: Could not determine relation direction for primaryjoin
condition 'drm_owners.owner_id = drm_contract_royalties.contract_id',
on relation Royalty.owner. Specify the 'foreign_keys' argument to
indicate which columns on the relation are foreign.
This error only shows when the 'backref' argument is specified and not
otherwise! Is this a bug in alchemy or am I missing something?
Here's the mapper conf:
===================
mapper(Royalty, royalties_table)
mapper(Owner, owners_table,
properties = {
'works': relation(Work, backref='owner'),
'royalty': relation(Royalty,
primaryjoin=owners_table.c.owner_id==royalties_table.c.contract_id,
foreign_keys=[royalties_table.c.contract_id],
backref='owner')
})
So, if I remove the 'backref' argument from the call to 'relation',
the relation works, but of course I lose the backref 'owner'.
Thanks!
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