Question

When the global application controller is loaded first, the namespaced application controller does not load when loading pages within that namespace. The application controller looks like this:

class ApplicationController < ActionController::Base
 protect_from_forgery
end

And the namespaced application controller looks like this:

class Admin::ApplicationController < ApplicationController

def authenticate_admin!
 if current_admin.nil?
  redirect_to new_admin_session_url
 end
end

private

 def current_admin
  @current_admin ||= Admin.find(session[:admin_id]) if session[:admin_id]
 end

helper_method :current_admin
end

When we use the before_filter “authenticate_admin!” like this:

class Admin::AssetsController < Admin::ApplicationController
  before_filter :authenticate_admin!
end

A “NoMethodError in Admin::AssetsController#new” is thrown. This only occurs when we hit the global route before the namespaced route. If the server is restarted and the namespaced route is loaded first everything works properly.

Answer 1

This is happening because you also happen to have an Admin model (a Class) with the same name as your namespace.

This Google group thread provides a good explanation of what exactly is happening.

To fix, I would either rename the model to AdminUser or if that is not a possibility, renaming the namespace will also fix the issue.