Rails 4 renaming route for "create" action

Question

# routes.rb
resource: :users, only: :create, path_names: { create: 'register' }

Following the routing guide at guides.rubyonrails.org, this line is expected to replace /users with /users/register, but the path_names argument seems to have no effect whatsoever. What am I doing wrong?

EDIT: Interesting that it only applies to new and edit. In any case, this is the work around I used

resource :users, only: :nothing do
  post "register", to: :create
end

Done this way to make it slightly easier to enable more actions for users in the future

Answer 1

From rails guide:

The :path_names option lets you override the automatically-generated "new" and "edit" segments in paths

It seems that you can't rename the create action.