Question

I have an admin namespace as such:

  namespace :admin do
    resources :users
    resources :base
  end

With the following directory structure:

/app/controllers/
        + admin
            - base_controller.rb
            - users_controller.rb
        - users_controller.rb
        - application_controller.rb

I have to wrap admin/users_conroller.rb in a module Admin end, otherwise I get an Uninitialized constant BaseController error:

class Admin::BaseController < ApplicationController
end

# Works fine
module Admin
  class UsersController < BaseController
  end
end

# Breaks with error
class Admin::UsersController < BaseController
end

Any idea why this is happening? Using Rails 3.2.

Answer 1

Namespaces map to directories, underscored filenames are camelcased for class names.

class Some::DeeplyNested::BaseActionsController < ApplicationController

needs to be in app/controllers/some/deeply_nested/base_actions_controller.rb for rails to find it.

In your code, there is no app/controllers/base_controller.rb, so BaseController in

class Admin::UsersController < BaseController

points to no class Rails knows about. You need to give it the admin namespace (as your class definition for BaseController also has)

class Admin::UsersController < Admin::BaseController
end

The above and your working code from your Question are one in the same

module Admin
  class UsersController < BaseController
  end
end