Rails add new view to devise - ruby-on-rails

Question

I have generated views with this command after I installed devise
rails generate devise:views
and I override registration controller by
class RegistrationsController < Devise::RegistrationsController
def sign_up2
end
end
And updated routes.rb with
devise_for :users, :controllers => { :registrations => "registrations" }
I expected to see a new route/view of
/users/sign_up2
but I don't see it
And here routes for devise
new_user_session GET /users/sign_in(.:format) devise/sessions#new
user_session POST /users/sign_in(.:format) devise/sessions#create
destroy_user_session DELETE /users/sign_out(.:format) devise/sessions#destroy
user_password POST /users/password(.:format) devise/passwords#create
new_user_password GET /users/password/new(.:format) devise/passwords#new
edit_user_password GET /users/password/edit(.:format) devise/passwords#edit
PATCH /users/password(.:format) devise/passwords#update
PUT /users/password(.:format) devise/passwords#update
cancel_user_registration GET /users/cancel(.:format) registrations#cancel
user_registration POST /users(.:format) registrations#create
new_user_registration GET /users/sign_up(.:format) registrations#new
edit_user_registration GET /users/edit(.:format) registrations#edit
PATCH /users(.:format) registrations#update
PUT /users(.:format) registrations#update
DELETE /users(.:format) registrations#destroy
But I would like a new view and route
Update:
issue when I load view
First argument in form cannot contain nil or be empty
in this line
<%= form_for(resource, :as => resource_name,:html => { :class => "form-horizontal col-sm-12",:role=>"form"}, :url => user_registration_path(resource_name)) do |f| %>

Answer 1

Invoke a devise_scope block and declare your custom route within:
devise_for :users, :controllers => { :registrations => "registrations" }
devise_scope :user do
get "users/sign_up2"=> "users/registrations#sign_up2", :as => "sign_up2_registration"
end
The section on Configuring routes in the documentation provides the following explanation of devise_scope:
If you have the need for more deep customization, for instance to also allow "/sign_in" besides "/users/sign_in", all you need to do is to create your routes normally and wrap them in a devise_scope block in the router
Previously, Devise allowed custom routes to be passed as a block to devise_for, but this behavior has been deprecated.
UPDATE:
To address the First argument in form cannot contain nil or be empty error, you need to ensure that your custom sign_up2 action is properly setting the resource variable. Assuming you want to mimic the registrations/new action, you can do something akin to the following:
def sign_up2
build_resource({})
respond_with self.resource
end
This ensures that the resource variable in your view is not nil and will not throw the exception you're currently witnessing.
Alternatively, depending on the behavior you're trying to evince, you can set your own instance variable in the custom controller action, then pass it as the resource to your form_for tag:
# app/controllers/users/registrations_controller.rb
def sign_up_2
#new_registrant = Registrant.new
end
# app/views/users/sign_up2.html.erb
<%= form_for(#new_registrant, :as => resource_name,:html => { :class => "form-horizontal col-sm-12",:role=>"form"}, :url => user_registration_path(resource_name)) do |f| %>
However, if you follow this approach, you should consider why you need to roll this into Devise. Devise, by default, assigns the resource variable via the build_resource function. If you're going to override/bypass this function, you should consider abstracting this entire functionality out of Devise since you're totally circumventing its default behavior.