I have the following setup:
(relevant excerpts only)
contacts = Table('contacts', meta,
Column('id', Integer, primary_key=True),
Column('display_as', String(75)),
Column('title', String(5)),
Column('first_name', String(25)),
Column('middle_name', String(25)),
Column('last_name', String(25)),
Column('suffix', String(5)),
Column('job_title', String(50)),
Column('department', String(50)),
Column('company', String(50)),
Column('gender', String(1)),
Column('website', String(100)),
Column('notes', Text),
Column('active', Boolean),
Column('account_id', Integer),
Column('time_zone_id', Integer),
Column('created_at', DateTime),
Column('updated_at', DateTime),
Column('created_by', Integer),
Column('updated_by', Integer),
ForeignKeyConstraint(['account_id'], ['accounts.id']),
ForeignKeyConstraint(['time_zone_id'], ['time_zones.id']),
ForeignKeyConstraint(['created_by'], ['contacts.id']),
ForeignKeyConstraint(['updated_by'], ['contacts.id'])
)
payment_methods = Table('payment_methods', meta,
Column('id', Integer, primary_key=True),
Column('contact_id', Integer),
Column('payment_method_type_id', Integer),
Column('created_at', DateTime),
Column('updated_at', DateTime),
Column('created_by', Integer),
Column('updated_by', Integer),
ForeignKeyConstraint(['contact_id'],['contacts.id']),
ForeignKeyConstraint(['payment_method_type_id'],
['payment_method_types.id']),
ForeignKeyConstraint(['created_by'],['contacts.id']),
ForeignKeyConstraint(['updated_by'],['contacts.id']),
)
class Contact(object):
pass
class PaymentMethod(object):
pass
mapper(Contact, contacts, extension=HistoryMapperExtension(),
properties={
'payment_methods': relation(PaymentMethod,
backref='contact',
primaryjoin=payment_methods.c.contact_id,
_local_remote_pairs=[(contacts.c.id, payment_methods.c.contact_id)],
foreign_keys=[payment_methods.c.contact_id],
backref='contact')
})
mapper(PaymentMethod, payment_methods)
A series of exceptions led me to add the primaryjoin, then
foreign_keys, then _local_remote_pairs options. Once all three were in
place I then received another ArgumentError exception advising I
specify a foreign_keys option.
Full exception text:
ArgumentError: Could not determine relation direction for primaryjoin
condition 'payment_methods.contact_id', on relation
PaymentMethod.contact (Contact). Specify the foreign_keys argument to
indicate which columns on the relation are foreign.
Any help would be appreciated.
-brad
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