Devise: Could not find devise mapping for path "/login"

[cheung-chifung]

I followed the code here https://github.com/plataformatec/devise/wiki/How-To:-Change-the-default-sign_in-and-sign_out-routes and read the readme, but still got this error.

# ERROR
AbstractController::ActionNotFound (Could not find devise mapping for path "/login".
 Maybe you forgot to wrap your route inside the scope block? For example:
    devise_scope :user do
      match "/some/route" => "some_devise_controller"
    end
):

# MY ROUTES SETTINGS

MyProject::Application.routes.draw do
  devise_scope :member do
    get "/login" => "devise/sessions#new"
  end

  mount Rich::Engine => '/rich'


  ActiveAdmin.routes(self)

  devise_for :admin_users, ActiveAdmin::Devise.config

end

# MY RAKE ROUTES (before I set mapping)
        new_member_session GET        /members/sign_in(.:format)            {:controller=>"devise/sessions", :action=>"new"}
            member_session POST       /members/sign_in(.:format)            {:controller=>"devise/sessions", :action=>"create"}
    destroy_member_session DELETE     /members/sign_out(.:format)           {:controller=>"devise/sessions", :action=>"destroy"}
           member_password POST       /members/password(.:format)           {:controller=>"devise/passwords", :action=>"create"}
       new_member_password GET        /members/password/new(.:format)       {:controller=>"devise/passwords", :action=>"new"}
      edit_member_password GET        /members/password/edit(.:format)      {:controller=>"devise/passwords", :action=>"edit"}
                           PUT        /members/password(.:format)           {:controller=>"devise/passwords", :action=>"update"}
cancel_member_registration GET        /members/cancel(.:format)             {:controller=>"devise/registrations", :action=>"cancel"}
       member_registration POST       /members(.:format)                    {:controller=>"devise/registrations", :action=>"create"}
   new_member_registration GET        /members/sign_up(.:format)            {:controller=>"devise/registrations", :action=>"new"}
  edit_member_registration GET        /members/edit(.:format)               {:controller=>"devise/registrations", :action=>"edit"}
                           PUT        /members(.:format)                    {:controller=>"devise/registrations", :action=>"update"}
                           DELETE     /members(.:format)                    {:controller=>"devise/registrations", :action=>"destroy"}
                      rich            /rich                                 {:to=>Rich::Engine}
    admin_api_get_stations GET        /admin_api/get_stations(.:format)     {:controller=>"admin_api", :action=>"get_stations"}
           admin_dashboard            /admin(.:format)                      {:controller=>"admin/dashboard", :action=>"index"}
            admin_comments GET        /admin/comments(.:format)             {:controller=>"admin/comments", :action=>"index"}
                           POST       /admin/comments(.:format)             {:controller=>"admin/comments", :action=>"create"}
         new_admin_comment GET        /admin/comments/new(.:format)         {:controller=>"admin/comments", :action=>"new"}
        edit_admin_comment GET        /admin/comments/:id/edit(.:format)    {:controller=>"admin/comments", :action=>"edit"}
             admin_comment GET        /admin/comments/:id(.:format)         {:controller=>"admin/comments", :action=>"show"}
                           PUT        /admin/comments/:id(.:format)         {:controller=>"admin/comments", :action=>"update"}
                           DELETE     /admin/comments/:id(.:format)         {:controller=>"admin/comments", :action=>"destroy"}
               admin_pages GET        /admin/pages(.:format)                {:controller=>"admin/pages", :action=>"index"}
                           POST       /admin/pages(.:format)                {:controller=>"admin/pages", :action=>"create"}
            new_admin_page GET        /admin/pages/new(.:format)            {:controller=>"admin/pages", :action=>"new"}
           edit_admin_page GET        /admin/pages/:id/edit(.:format)       {:controller=>"admin/pages", :action=>"edit"}
                admin_page GET        /admin/pages/:id(.:format)            {:controller=>"admin/pages", :action=>"show"}
                           PUT        /admin/pages/:id(.:format)            {:controller=>"admin/pages", :action=>"update"}
                           DELETE     /admin/pages/:id(.:format)            {:controller=>"admin/pages", :action=>"destroy"}
             admin_members GET        /admin/members(.:format)              {:controller=>"admin/members", :action=>"index"}
                           POST       /admin/members(.:format)              {:controller=>"admin/members", :action=>"create"}
          new_admin_member GET        /admin/members/new(.:format)          {:controller=>"admin/members", :action=>"new"}
         edit_admin_member GET        /admin/members/:id/edit(.:format)     {:controller=>"admin/members", :action=>"edit"}
              admin_member GET        /admin/members/:id(.:format)          {:controller=>"admin/members", :action=>"show"}
                           PUT        /admin/members/:id(.:format)          {:controller=>"admin/members", :action=>"update"}
                           DELETE     /admin/members/:id(.:format)          {:controller=>"admin/members", :action=>"destroy"}
         admin_admin_users GET        /admin/admin_users(.:format)          {:controller=>"admin/admin_users", :action=>"index"}
                           POST       /admin/admin_users(.:format)          {:controller=>"admin/admin_users", :action=>"create"}
      new_admin_admin_user GET        /admin/admin_users/new(.:format)      {:controller=>"admin/admin_users", :action=>"new"}
     edit_admin_admin_user GET        /admin/admin_users/:id/edit(.:format) {:controller=>"admin/admin_users", :action=>"edit"}
          admin_admin_user GET        /admin/admin_users/:id(.:format)      {:controller=>"admin/admin_users", :action=>"show"}
                           PUT        /admin/admin_users/:id(.:format)      {:controller=>"admin/admin_users", :action=>"update"}
                           DELETE     /admin/admin_users/:id(.:format)      {:controller=>"admin/admin_users", :action=>"destroy"}
                admin_jobs GET        /admin/jobs(.:format)                 {:controller=>"admin/jobs", :action=>"index"}
                           POST       /admin/jobs(.:format)                 {:controller=>"admin/jobs", :action=>"create"}
             new_admin_job GET        /admin/jobs/new(.:format)             {:controller=>"admin/jobs", :action=>"new"}
            edit_admin_job GET        /admin/jobs/:id/edit(.:format)        {:controller=>"admin/jobs", :action=>"edit"}
                 admin_job GET        /admin/jobs/:id(.:format)             {:controller=>"admin/jobs", :action=>"show"}
                           PUT        /admin/jobs/:id(.:format)             {:controller=>"admin/jobs", :action=>"update"}
                           DELETE     /admin/jobs/:id(.:format)             {:controller=>"admin/jobs", :action=>"destroy"}
    new_admin_user_session GET        /admin/login(.:format)                {:controller=>"active_admin/devise/sessions", :action=>"new"}
        admin_user_session POST       /admin/login(.:format)                {:controller=>"active_admin/devise/sessions", :action=>"create"}
destroy_admin_user_session DELETE|GET /admin/logout(.:format)               {:controller=>"active_admin/devise/sessions", :action=>"destroy"}
       admin_user_password POST       /admin/password(.:format)             {:controller=>"active_admin/devise/passwords", :action=>"create"}
   new_admin_user_password GET        /admin/password/new(.:format)         {:controller=>"active_admin/devise/passwords", :action=>"new"}
  edit_admin_user_password GET        /admin/password/edit(.:format)        {:controller=>"active_admin/devise/passwords", :action=>"edit"}
                           PUT        /admin/password(.:format)             {:controller=>"active_admin/devise/passwords", :action=>"update"}
                      root            /                                     {:controller=>"welcome", :action=>"index"}

# AFTER I set mapping
                     login GET        /login(.:format)                      {:controller=>"devise/sessions", :action=>"new"}
                      rich            /rich                                 {:to=>Rich::Engine}
    admin_api_get_stations GET        /admin_api/get_stations(.:format)     {:controller=>"admin_api", :action=>"get_stations"}
           admin_dashboard            /admin(.:format)                      {:controller=>"admin/dashboard", :action=>"index"}
            admin_comments GET        /admin/comments(.:format)             {:controller=>"admin/comments", :action=>"index"}
                           POST       /admin/comments(.:format)             {:controller=>"admin/comments", :action=>"create"}
.
.
.

Thank you.

[josevalim]

Could you please provide a simple app that reproduces the error and push it to Github? We have tests that cover exactly this feature and they are working fine. Thanks.

[josevalim]

Also, which Devise and Rails versions are you using?

[cheung-chifung]

Thank you for your help, but I figured out this problem now by add "devise_for :members".
The code in wiki mislead people sometimes.

MyProject::Application.routes.draw do
   devise_for :members
   devise_scope :member do
    get "/login" => "devise/sessions#new"
  end
end

[haider-ali-scitechis]

@keekun Thank you very much. It works for me