[Sqlalchemy-tickets] Issue #3948: post-load of joined-inh subtables (zzzeek/sqlalchemy)

[Michael B. <iss...@bi...>]

New issue 3948: post-load of joined-inh subtables
https://bitbucket.org/zzzeek/sqlalchemy/issues/3948/post-load-of-joined-inh-subtables

Michael Bayer:

using the post_load architecture of #3944, add `post_with_polymorphic` argument to mapper.    Subclasses will be loaded using a query like query(Subclass).options(defer(everything on superclass), noload(everything on superclass)), as opposed to a custom SELECT statement the way the lazy load works, so that relationship loaders and other loader options on the subclass take effect normally.