NoMethodError（Admin :: Notification：Class的未定义方法“ all”）

Question

I am getting this error when I am visiting this URL admin/notifications

I have moved controller and routes under admin scope

NoMethodError (undefined method `all' for Admin::Notification:Class)

Notifications controller

# app/controllers/admin/notifications_controller.rb
module Admin
  class NotificationsController < AdminController
    def index
      @notifications = Notification.all
    end
  end
end

Notification

# app/models/notification.rb
class Notification < ActiveRecord::Base
  has_many :preferences
end

routes.rb

MyApp::Application.routes.draw do
  namespace :admin do
    resources :notifications
  end
end

Routes

    admin_notifications GET    /admin/notifications(.:format)           admin/notifications#index
                        POST   /admin/notifications(.:format)           admin/notifications#create
 new_admin_notification GET    /admin/notifications/new(.:format)       admin/notifications#new
edit_admin_notification GET    /admin/notifications/:id/edit(.:format)  admin/notifications#edit
     admin_notification GET    /admin/notifications/:id(.:format)       admin/notifications#show
                        PUT    /admin/notifications/:id(.:format)       admin/notifications#update
                        DELETE /admin/notifications/:id(.:format)       admin/notifications#destroy

Thanks

Answer 1

Try ::Notification.all

It should works.

You are inside Admin module. Notification.all is searching for the Notification inside module named Admin

::Notification indicate that Notification model is in global Module. So it should get the model and it should solved your error.