Adrian wrote:
>
> in my case it must be something different. The following code works
> perfectly fine in 0.5.2:
>
> mapper(Contact, CONTACTS)
>
> mapper(Atom, ATOMS,
> properties = {
> 'Contacts': relation(Contact,
> primaryjoin = Contact.atom_id==ATOMS.c.id,
> foreign_keys = [Contact.atom_id], lazy=True,
> uselist=True, viewonly=True,
> backref = backref('Atom', primaryjoin =
> Contact.atom_id==ATOMS.c.id,
> foreign_keys =
> [ATOMS.c.id],
> lazy=True, uselist=False,
> viewonly=True)
> )
> })
>
> In: atom = session.query(Atom).filter(Atom.id==57).one()
>
> In: atom.Contacts
> Out: [<Contact(57, 9)>]
>
> In 0.5.3 however, the backref() will throw the following error:
>
> ArgumentError: Atom.Contacts and back-reference Contact.Atom are both
> of the same direction <symbol 'ONETOMANY>. Did you mean to set
> remote_side on the many-to-one side ?
>
> Any ideas?
in this case you have set the foreign_keys collection backwards on the
backref. the foreign key is always contact.atom_id. its also not needed
if you have ForeignKey objects on your table metadata.
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