How can I extend ApplicationController in a gem?

Question

I thought I\'d come up with a slick way to extend ApplicationController in a Rails 3.x gem.

In my gem\'s lib/my_namespace/my_controller.rb, I had:

Answer 1

Truth is much much simpler and flexible.

Add to lib/engine.rb this: class Engine < Rails::Engine; end

And then simply use:

ActionController::Base.class_eval do

  include SomethingFromMineGemModule

  # or:
  def hello_from_gem
    'Hey people!'
  end

end