Error with aliased columns (ie with from_self) if model contains field named "info" about sqlakeyset

[acarapetis]

Thanks for your report! The current introspection in derive_order_key is indeed pretty ad-hoc - since sqlalchemy's internals have a reasonably strong type heirarchy, a lot of those hasattr checks can probably be replaced by isinstance checks.

I'll try to find some time to fix this soon, but we're also very happy to accept pull requests: if you wanted to add a minimal test in test_paging.py that fails due to this bug, that would be a great starting point.

[koirikivi]

Hey @acarapetis, thanks so much for tackling this and sorry for not having the time to contribute the test myself. Waiting eagerly for this to get merged :)