gistfile1.rb

  identify(PortalApp => :name, Theme => :name) do
    themify = proc do |request, params|
        portal_app = PortalApp.portal_app_from_params(params)
        unless portal_app.nil?
          theme = portal_app.theme_from_params(params)
          controller = SageUsers.signup_controller_for_portal_app_and_theme(portal_app, theme)
          params.merge!(:controller => controller)
        end
        params
    end

    defer(themify) do
      resources :sage_users, :member => {:thankyou => :get}, :path => "(:portal_app(/:theme)/)signup"  
    end

  end