On 05/06/2013 13:46, sajuptpm wrote:
Hi,
I also tried like this, But not working
instance_of_B.__mapper_args__["polymorphic_identity"] = "type_c"
DBSession.add(instance_of_B)
transaction.commit();
and
instance_of_B.__mapper__.polymorphic_identity = "type_c"
DBSession.add(instance_of_B)
transaction.commit();
You should not modify polymorphic_identity directly:
http://docs.sqlalchemy.org/en/rel_0_8/orm/mapper_config.html?highlight=polymorphic_identity#sqlalchemy.orm.mapper.Mapper.polymorphic_identity
"This is a /read only/ attribute determined during mapper construction.
Behavior is undefined if directly modified."
Thanks,
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