Hi All,
In 0.6_beta2, the following code is not properly adding a primary key Column
via DeclarativeMeta which calls my PrimaryKey() function:
def PrimaryKey(seqprefix):
return Column(Integer, Sequence(seqprefix, optional=True),
primary_key=True)
class ClassDefaults(DeclarativeMeta):
def __init__(cls,classname, bases, dict_):
seqprefix = getattr(cls,'__tablename__',None)
dict_['id'] = PrimaryKey(seqprefix=seqprefix)
return DeclarativeMeta.__init__(cls, classname, bases, dict_)
Base = declarative_base(metaclass=ClassDefaults)
class Location(Base):
__tablename__ = 'location'
parent_id = Column(Integer, ForeignKey('location.id'))
parent = relation('Location', backref=backref('children'),
remote_side='location.c.id')
name = UniqueString(25)
desc = Column(String(80))
SQLAlchemy 0.6_beta2 complains on table initialization:
File "/usr/lib64/python2.6/site-packages/sqlalchemy/orm/mapper.py", line 444,
in _configure_pks
"key columns for mapped table '%s'" % (self, self.mapped_table.description))
sqlalchemy.exc.ArgumentError: Mapper Mapper|Location|location could not
assemble any primary key columns for mapped table 'location'
This worked under 0.6_beta1 (and likely earlier versions of SQLAlchemy).
Can someone send me some code similar to above that works with 0.6_beta2, or is
this a bug in beta2?
Thanks,
Daniel
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