View rails http status codes
HTTP status code symbols for Rails
Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.
Status Code Symbol
1xx Informational
100 :continue
101 :switching_protocols
102 :processing
View RECIPE.md

An application I'm working on has two different types of Devise users, but I want both types of users to be able to use the same sign in form. Devise doesn't make this easy.

You could argue that I really should have a single user type with a role attribute, but the app is far enough along that I don't want to change that early design decision. It could be changed later if more pain points are discovered.

You could also argue that I shouldn't use Devise, but it's still the de facto authentication standard for Rails applications.

In this example, you can sign in as either a User or an AdminUser. This application only has two types of user, but this example could be extended to support any number of them more gracefully.