rails/rails — pull request #15987 by jamesprior (2014-06-30 13:39:44+00:00)
Title: Update documentation on STI change handling

Documenting a potential source of confusion about how STI classes handle changes. This is really how STI currently works with change tracking.

If this looks like the wrong behavior I am more than happy to put together a patch to make it work like the `updated_at` or `created_at` columns.