Rails routing: resources with only custom actions

Question

I have a NotificationsController, in which I only have the action clear.

I'd like to access this action by doing POST /notifications/clear

So I wrote this in my router:

  resources :notifications, :only => [] do
    collection do
      post :clear
    end
  end

Is there a cleaner way to achieve this? I thought

  scope :notifications do
    post :clear
  end

would do it, but I have a missing controller error, because - I think - it looks for the clear controller.

Answer 1

If you are using scope, you should add a controller looks like

scope :notifications, :controller => 'notifications' do
  post 'clear'
end

Or just use namespace

namespace :notifications do
  post 'clear'
end

Answer 2

post "notifications/clear" => "notifications#clear"

Answer 3

1. I tried three combinations:

namespace :notifications do
  put :clear
end

scope :notifications, controller: :notifications do
  put :clear
end

resources :notifications, only: [] do
  collection do
    put :clear
  end
end

rails routes:

notifications_clear   PUT /notifications/clear(.:format)  notifications#clear
clear                 PUT /notifications/clear(.:format)  notifications#clear
clear_notifications   PUT /notifications/clear(.:format)  notifications#clear # I choose this

Because of the url helper clear_notifications_*, I will choose the 3rd combination.

---

2. Moreover, actually I want to nest these routes in a resource:

resources :users do
  namespace :notifications do
    put :clear
  end

  scope :notifications, controller: :notifications do
    put :clear
  end

  resources :notifications, only: [] do
    collection do
      put :clear
    end
  end
end

rails routes:

user_notifications_clear  PUT /users/:user_id/notifications/clear(.:format)  notifications/users#clear
user_clear                PUT /notifications/users/:user_id/clear(.:format)  notifications#clear
clear_user_notifications  PUT /users/:user_id/notifications/clear(.:format)  notifications#clear

Still better to use resources block with only: [].

---

P.S. I think it makes more sense by namespacing the notifications controller under users:

resources :users, module: :users do
  resources :notifications, only: [] do
    collection do
      put :clear
    end
  end
end

clear_user_notifications  PUT /users/:user_id/notifications/clear(.:format)  users/notifications#clear