devise_url_workaround_helper.rb

module DeviseUrlWorkaroundHelper
  def session_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_session_path", *args)
  end
  def new_session_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_session_path", *args)
  end
  def destroy_session_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("destroy_#{scope}_session_path", *args)
  end
  def session_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_session_url", *args)
  end
  def new_session_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_session_url", *args)
  end
  def destroy_session_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("destroy_#{scope}_session_url", *args)
  end
  def password_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_password_path", *args)
  end
  def new_password_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_password_path", *args)
  end
  def edit_password_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("edit_#{scope}_password_path", *args)
  end
  def password_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_password_url", *args)
  end
  def new_password_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_password_url", *args)
  end
  def edit_password_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("edit_#{scope}_password_url", *args)
  end
  def registration_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_registration_path", *args)
  end
  def new_registration_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_registration_path", *args)
  end
  def edit_registration_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("edit_#{scope}_registration_path", *args)
  end
  def cancel_registration_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("cancel_#{scope}_registration_path", *args)
  end
  def registration_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_registration_url", *args)
  end
  def new_registration_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_registration_url", *args)
  end
  def edit_registration_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("edit_#{scope}_registration_url", *args)
  end
  def cancel_registration_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("cancel_#{scope}_registration_url", *args)
  end
  def confirmation_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_confirmation_path", *args)
  end
  def new_confirmation_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_confirmation_path", *args)
  end
  def confirmation_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_confirmation_url", *args)
  end
  def new_confirmation_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_confirmation_url", *args)
  end
  def unlock_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_unlock_path", *args)
  end
  def new_unlock_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_unlock_path", *args)
  end
  def unlock_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_unlock_url", *args)
  end
  def new_unlock_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_unlock_url", *args)
  end
  def session_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_session_path", *args)
  end
  def new_session_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_session_path", *args)
  end
  def destroy_session_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("destroy_#{scope}_session_path", *args)
  end
  def session_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_session_url", *args)
  end
  def new_session_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_session_url", *args)
  end
  def destroy_session_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("destroy_#{scope}_session_url", *args)
  end
  def confirmation_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_confirmation_path", *args)
  end
  def new_confirmation_path(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_confirmation_path", *args)
  end
  def confirmation_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("#{scope}_confirmation_url", *args)
  end
  def new_confirmation_url(resource_or_scope, *args)
    scope = Devise::Mapping.find_scope!(resource_or_scope)
    _devise_route_context.send("new_#{scope}_confirmation_url", *args)
  end
end

As unDRY as it gets ;)