Rails - Jan 2010 - union of two forms in one

Hello, I have two forms. One of them is for keep the info in BBDD, and
the other is to pay in PayPal.

In my store I have in tienda_controller.rb an action to checkout. It
redirect you to checkout1.html.erb

#views/tienda/checkout1.html.erb

<h1>PASO 1</h1>

  <%= error_messages_for ''pedido'' %>

  <% form_for :pedido, :url => { :action => :save_order } do |form|
%>
    <fieldset>
      <legend>Introduce tus datos de facturación.</legend>

      <div>
        <%= form.label :nombre, "Nombre:" %>
        <%= form.text_field :nombre, :size => 40 %>
      </div>

      <div>
        <%= form.label :direccion, "Dirección:" %>
        <%= form.text_area :direccion, :rows => 3, :cols => 40 %>
      </div>

      <div>
        <%= form.label :email, "E-Mail:" %>
        <%= form.text_field :email, :size => 40 %>
      </div>

      <div>
        <%= form.label :tipo_pago, "Pago con:" %>
        <%          form.select :tipo_pago,
                       Pedido::TIPOS_PAGO,
                      :prompt => "Selecciona método de pago"
        %>
      </div>

      <%= submit_tag "Aceptar pedido", :class =>
"submit" %>
    </fieldset>
  <% end %>
</div>

Here you will introduce an billing info.

when you finish this form and submit, you will redirect to a page that
only can push a button "Pay with PayPal". The form is this:


#views/tienda/checkout.html.erb



   <% form_tag
''https://www.sandbox.paypal.com/cgi-bin/webscr'' do %>
  <%= hidden_field_tag "cmd", "_cart" %>
  <%= hidden_field_tag "upload", "1" %>
  <%= hidden_field_tag "business",
"alr113_1262371878_biz-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org" %>
    <%= hidden_field_tag "currency_code", value="EUR"
%>
  <%= hidden_field_tag "country", value="ES" %>
  <%= hidden_field_tag "notify_url",
"payment_notifications_url" %>

  <%= render(:partial => "paypal_item", :collection =>
@carrito.items)
%>

  <%= hidden_field_tag "return",
"http://localhost:3000/tienda/finalizado" %>
  <%= submit_tag "Comprar en PayPal", :class =>
"submit" %>
  <% end %>

and my tienda_controller

  def save_order
    @carrito = encontrar_carrito
    @pedido = Pedido.new(params[:pedido])
    @pedido.anadir_item_lineas_de_carrito(@carrito)
   if @pedido.save
      #session[:carrito] = nil
      redirect_to_paypal("Solo queda un ultimo paso. Realiza el pago con
PayPal: un método más seguro para pagos en internet.")
    else
      render :action => :checkout1
    end
  end

Only I want that when the user want to checkout don''t redirect to two
different pages. I want that fills the checkout1 form(Name, address,
email...) and when the user click the submit button, my page redirect
him directly to paypal page.

It is possible?
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