Per subject. This is impacting the TurboGears identity provider table
creation code, which tries to call
class_mapper(user_class).props['groups'].secondary but is unable to find
'groups' (a many_to_many relationship) in the properties list.
I'm able to reproduce this with a minimalist test case:
>>> from sqlalchemy.ext.activemapper import *
>>>
>>> engine = create_engine('sqlite:///:memory:')
>>> conn = engine.connect()
>>>
>>> foo_bar_map_table = Table('foo_bar_map', engine,
... Column('foo_id', Integer, ForeignKey('foo_tbl.foo_id'),
primary_key=True),
... Column('bar_id', Integer, ForeignKey('bar_tbl.bar_id'),
primary_key=True))
>>>
>>> class Foo(ActiveMapper):
... class mapping:
... __table__ = 'foo_tbl'
... foo_id = column(Integer, primary_key=True)
... foo_text = column(String(30))
... bars = many_to_many('Bar', foo_bar_map_table, backref='foos')
...
>>> class Bar(ActiveMapper):
... class mapping:
... __table__ = 'bar_tbl'
... bar_id = column(Integer, primary_key=True)
... bar_text = column(String(30))
... foos = many_to_many('Foo', foo_bar_map_table, backref='bars')
...
>>> from pprint import pprint
>>> pprint(class_mapper(Foo).props)
{'foo_id': ColumnProperty(['foo_tbl.foo_id']),
'foo_text': ColumnProperty(['foo_tbl.foo_text'])}
If the assumptions made in the TurboGears identity provider code were
accurate, class_mapper(Foo).props would contain an element associated
with 'bars'; in practice, it does not.
Is this an issue with ActiveMapper, or with the assumptions made by the
TurboGears identity provider? I'm working with TurboGears trunk r1557
and SQLAlchemy trunk r1622.
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