Given the following relationships:
employees_table = Table('employees', metadata,
Column('id', Integer, primary_key=True),
Column('row_type', Integer, nullable=False)
Column('name', String(50)),
Column('is_certified', Boolean)
)
employee_mapper = mapper(Employee, employees_table,
polymorphic_on=employees_table.c.row_type,
polymorphic_identity=1,
exclude_properties=['is_certified'])
manager_mapper = mapper(Manager, inherits=employee_mapper,
polymorphic_identity=2,
properties={
'is_certified': employees_table.c.is_certified
})
How can I query for employees who aren't managers or managers who are
certified without referring to the polymorphic identity? Basically,
without doing this:
session.query(Employee).filter(or_(Employee.row_type!=2,
Manager.is_certified==True))
Thanks!
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