pass_delivery_one_option

Spree::CheckoutController.class_eval do
  alias_method :orig_before_payment, :before_payment
  
  protected
  def before_delivery
    orig_before_delivery    
     
    if !flash[:error] && @order.shipments.count == 1 && @order.shipments.first.shipping_rates.count == 1     

      @order.shipments.first.selected_shipping_rate_id = @order.shipments.first.shipping_rates[0].id
      unless @order.next
        flash[:error] = @order.errors.full_messages.join("\n")
        redirect_to checkout_state_path(@order.state) and return
      end 
      redirect_to checkout_state_path(@order.state)
    end   
    
  end 
end

alias_method :orig_before_payment, :before_payment should be alias_method :orig_before_delivery, :before_delivery right?