raise / raiseload strategy

[Mike Bayer]

have a nice PR ready to go w/ this so this should be easy for 1.1

https://github.com/zzzeek/sqlalchemy/pull/193/files

[Adrian]

let me know if it'll be 1.1-only - then i'll amend my commit to add it to the proper changelog file and fix the :versionadded:

[Mike Bayer]

it's 1.1 only. I'm being more strict about new features going only in forwards versions. 1.0 has enough effort covering all the subtle use cases that weren't tested in 0.9.

[Adrian]

ok, updated the PR

[Mike Bayer]

Add raise/raiseload relationship loading strategy

Fixes: #3512 Co-Authored-By: Mike Bayer [e-mail] Change-Id: Ibd126c50eda621e2f4120ee378f7313af2d7ec3c Pull-request: https://github.com/zzzeek/sqlalchemy/pull/193

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