File "/var/task/common/repository.py", line 74, in delete_all
res = self._session.query(model).delete()
File "/opt/python/sqlalchemy/orm/session.py", line 1558, in query
return self._query_cls(entities, self, **kwargs)
File "/opt/python/sqlalchemy/orm/query.py", line 191, in __init__
self._set_entities(entities)
File "/opt/python/sqlalchemy/orm/query.py", line 219, in _set_entities
self._set_entity_selectables(self._entities)
File "/opt/python/sqlalchemy/orm/query.py", line 250, in _set_entity_selectables
ent.setup_entity(*d[entity])
File "/opt/python/sqlalchemy/orm/query.py", line 4187, in setup_entity
self._with_polymorphic = ext_info.with_polymorphic_mappers
File "/opt/python/sqlalchemy/util/langhelpers.py", line 883, in __get__
obj.__dict__[self.__name__] = result = self.fget(obj)
File "/opt/python/sqlalchemy/orm/mapper.py", line 2141, in
_with_polymorphic_mappers
configure_mappers()
File "/opt/python/sqlalchemy/orm/mapper.py", line 3255, in configure_mappers
mapper._post_configure_properties()
File "/opt/python/sqlalchemy/orm/mapper.py", line 1950, in
_post_configure_properties
prop.init()
File "/opt/python/sqlalchemy/orm/interfaces.py", line 196, in init
self.do_init()
File "/opt/python/sqlalchemy/orm/relationships.py", line 1984, in do_init
self._setup_join_conditions()
File "/opt/python/sqlalchemy/orm/relationships.py", line 2048, in
_setup_join_conditions
self._join_condition = jc = JoinCondition(
File "/opt/python/sqlalchemy/orm/relationships.py", line 2408, in __init__
self._determine_joins()
File "/opt/python/sqlalchemy/orm/relationships.py", line 2504, in
_determine_joins
self.secondaryjoin = join_condition(
File "<string>", line 2, in join_condition
File "<string>", line 2, in _join_condition
File "/opt/python/sqlalchemy/util/deprecations.py", line 128, in warned
return fn(*args, **kwargs)
File "/opt/python/sqlalchemy/sql/selectable.py", line 932, in _join_condition
constraints = cls._joincond_scan_left_right(
File "/opt/python/sqlalchemy/sql/selectable.py", line 987, in
_joincond_scan_left_right
b.foreign_keys, key=lambda fk: fk.parent._creation_order
AttributeError: type object 'BusinessAreaContact' has no attribute
'foreign_keys'

On Tue, Dec 15, 2020 at 8:50 AM Mike Bayer <[email protected]> wrote:
>
> hey there -
>
> I don't know what that is.  Can you share the complete stack trace?  that 
> would show me where it is misinterpreting something.  thanks!
>
>
>
> On Tue, Dec 15, 2020, at 7:48 AM, Larry Martell wrote:
>
> I have this model class:
>
> class BusinessAreaContact(Base):
>     __tablename__ = 'BusinessAreaContact'
>
>     businessAreaID = Column(ForeignKey('BusinessArea.businessAreaID'),
> primary_key=True, nullable=False)
>     contactEmail = Column(ForeignKey('Contact.contactEmail'),
> primary_key=True, nullable=False)
>
> If I try and delete from the table with:
>
> session.query(BusinessAreaContact).delete()
>
> I get:
>
> AttributeError: type object 'BusinessAreaContact' has no attribute
> 'foreign_keys'
>
> I have other models where I define FKs in the same way, and I do not
> get that error with those. What makes this model different and how can
> I fix this error?
>
> Thanks!

-- 
SQLAlchemy - 
The Python SQL Toolkit and Object Relational Mapper

http://www.sqlalchemy.org/

To post example code, please provide an MCVE: Minimal, Complete, and Verifiable 
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