How to retrieve the controller class from within a view/helper in Rails 3?

Question

I know about controller_name returning a string containing the controller's name but how can I retrieve the controller class (or object) from within a helper?

EDIT: The solution should also work when the controller is namespaced (eg. Admin::PostsController)

Answer 1

You can use the constantize method, like:

controller_name.constantize

Though I'm not sure how it will behave if you have a namespaced controller.

Update:

That one won't work for all controller names and/or namespaces. Though one can use the #controller method in combination with #class:

controller.class