Could not find devise mapping for path “/sessions/user” devise log in error

Question

Very frustrating for the last few days.

I have a rails app with Devise installed where I generated a new User model and I generated Devise views as well.

This h

Answer 1

This error (AbstractController::ActionNotFound - Could not find devise mapping for path) can arise if devise_scope is passed a plural scope instead of a singular scope.

The devise_for method takes a plural form of model scope (i.e. :users) whereas the devise_scope takes the singular form (i.e. :user).

From the devise documentations (http://www.rubydoc.info/github/plataformatec/devise/ActionDispatch%2FRouting%2FMapper%3Adevise_scope):

Also be aware of that 'devise_scope' and 'as' use the singular form of the noun where other devise route commands expect the plural form. This would be a good and working example.

devise_scope :user do
  get "/some/route" => "some_devise_controller"
end
devise_for :users