Table structure:
A(id, name)
B(id, name, A_id)
C(id, name, B_id)
one-to-many A-B and B-C
I'm trying to use session.query() to select all rows of A such that
none of the joined B rows have any joined C rows.
A:
(1,'A1')
(2,'A2')
B:
(1,'B1',1)
(2,'B2',1)
(3,'B3',2)
C:
(1,'C1',1)
So, it would
Assuming I have the following simplified classes:
class A(Base):
__tablename__ = 'a'
id = Column(Integer, primary_key=True)
type = Column(Unicode)
enabled = Column(Boolean)
__mapper_args__ = {'polymorphic_on': type}
class B(A):
__tablename__ = 'b'
__mapper_args__ =
Thanks your quick respone, that is exactly what I was looking for.
On Aug 13, 10:40 am, Michael Bayer mike...@zzzcomputing.com wrote:
you're looking for query.with_polymorphic(). see the mapping
documentation section on joined table inheritance for details.
rake wrote:
Assuming I have
