Rails - Dec 2005 - newbie question

Hi all,

I''m following the shop example in ''Agile Web Development with
Rails''.

I would like to extend the checkout screen, in such a way people can change
the number of items they have selected in there cart.

In my controller I have:

  def checkout
      @cart = find_cart
      @items = @cart.items
      if @items.empty?
          redirect_to_index("There''s nothing in your cart!")
      else
          @order = Order.new
          @address = Address.new
      end
  end


I also created the following checkout.rhtml file:

<% @page_title = "Checkout" -%>

<%= error_messages_for(:order) %>


<%= start_form_tag(:action => "update_order") %>

<table>
<%= render(:partial => ''orderitem'', :collection =>
@items) %>
</table>

<%= submit_tag "Update" %>


<%= end_form_tag %>

Finally I created the following partial:

<% product = orderitem.product %>

<tr>
    <td><%= check_box ''orderitem'',
''delete'', ''index'' => orderitem_counter
%></td>
    <td><%= text_field ''orderitem'',
''quantity'', ''value'' =>
orderitem.quantity, ''index'' => orderitem_counter, :size
=> 4 %></td>
    <td><%= product.brand %> <%= product.title %></td>
</tr>


Now when the user submits the form, I would like to read the quantity for
each line_item and update my cart accordingly. Also, if the checkbox is
checked I would like to delete the line_item from the cart.

I have no clue how to do this in my controller....

Can you give me a hint?

Regards,

Harm de Laat


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