Dashboard::DashboardController.ancestors => [Dashboard::DashboardController, Dashboard::ApplicationController, ApplicationController, ... ] Member::MemberController.ancestors => [Member::MemberController, ApplicationController, ... ]

gistfile1.rb

# app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
  protect_from_forgery
end

# app/controllers/dashboard/application_controller.rb
module Dashboard
  class ApplicationController < ::ApplicationController
    before_filter :authenticate_user!
  end
end

# app/controllers/dashboard/dashboard_controller.rb
module Dashboard
  class DashboardController < ApplicationController
    def index
    end
  end
end

# app/controllers/member/application_controller.rb
module Member
  class ApplicationController < ::ApplicationController
    before_filter :authenticate_user!
  end
end

# app/controllers/member/member_controller.rb
module Member
  class MemberController < ApplicationController
    def index
    end
  end
end