How to use module in lib from controller with Rails?

Question

I created a module in my lib directory:

# lib/a/b/c.rb
 module A
   module B
     class C
       def say
         p 'Hi!'
       end
     end
   end
 end

Now I want to call C class from this module file.

# app/controllers/c_controller.rb
@data = A::B::C.new.say

And add this to config file:

# config/application.rb
config.autoload_paths += %W(#{config.root}/lib)

But it gave me an error:

NameError in CController#index
uninitialized constant CController::say

Was my source wrong?

Answer 1

I know the reason. It is necessary to add require in the first line of the controller:

require 'a/b/c'