Rails integration eagerly loads ActionController::Base

[sfnelson]

Rails integration refers to ActionController::Base directly. This breaks lazy loading for all controllers and causes Rails 6 to want about eagerly loaded Constants, e.g.

DEPRECATION WARNING: Initialization autoloaded the constants ActionText::ContentHelper and ActionText::TagHelper.

Being able to do this is deprecated. Autoloading during initialization is going
to be an error condition in future versions of Rails.

Reloading does not reboot the application, and therefore code executed during
initialization does not run again. So, if you reload ActionText::ContentHelper, for example,
the expected changes won't be reflected in that stale Module object.

These autoloaded constants have been unloaded.

Please, check the "Autoloading and Reloading Constants" guide for solutions.

This also causes occasional errors in development when constants should change but do not due to improper load order.