Hello,
We have been trying to mix a class inherited from declarative_base()
("Country") with plain Python classes mapped using orm.mapper. We're
getting the error:
UnmappedClassError: Class 'doupy.model.objects.Country' is not mapped
code:
Base = declarative_base()
class Country(object):
__tablename__ = 'countries'
...
Base.metadata.bind = engine
We also tried to create Base using
Base = declarative_base(bind=engine)
and
Base = declarative_base(metadata=meta)
with the same error.
Full traceback below:
File '/Users/amaslov/Projects/dou-pylons/doupy/doupy/model/
__init__.py', line 73 in <lambda>
return property(fget=lambda self: self.session.query(cls))
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/session.py', line
898 in query
return self._query_cls(entities, self, **kwargs)
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/query.py', line 91
in __init__
self._set_entities(entities)
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/query.py', line 100
in _set_entities
self.__setup_aliasizers(self._entities)
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/query.py', line 114
in __setup_aliasizers
mapper, selectable, is_aliased_class = _entity_info(entity)
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/util.py', line 485
in _entity_info
mapper = class_mapper(entity, compile)
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/util.py', line 560
in class_mapper
mapper = mapper.compile()
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/mapper.py', line
662 in compile
mapper._post_configure_properties()
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/mapper.py', line
691 in _post_configure_properties
prop.init()
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/interfaces.py',
line 408 in init
self.do_init()
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/properties.py',
line 707 in do_init
self._get_target()
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/properties.py',
line 719 in _get_target
self.mapper = mapper.class_mapper(self.argument, compile=False)
File '/Users/amaslov/Projects/dou-pylons/py/lib/python2.5/site-
packages/SQLAlchemy-0.5.2-py2.5.egg/sqlalchemy/orm/util.py', line 557
in class_mapper
raise exc.UnmappedClassError(class_)
UnmappedClassError: Class 'doupy.model.objects.Country' is not mapped
Any help is very much appreciated!
Regards,
Alex
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