Rails - Oct 2005 - Adding extra field in form using ajax causes extra field to be overwritten, any way around that.

I''m having trouble when I try to add another field in the form using
ajax.
I''m trying to add another line_item object into the invoice and
i''m using
the link_to_remote function to implement this. When I do that though and
submit to the form, the line_item entries all have the same field name so
they get overwritten. I''m not sure how to get around that.

Here is my _form.rhtml:

<%= error_messages_for ''invoice'' %>

<!--[form:invoice]-->
<p><label for="invoice_invoice_date">Invoice
date</label><br/>
<%= datetime_select ''invoice'',
''invoice_date'' %></p>

<table border=1>
<tr>
<td>Description</td><td>Price</td>
</tr>
</table>
<table border=1><tr><td><input
id="line_item_description"
name="line_item[description]" size="30"
type="text" /></td><td><input
id="line_item_price" name="line_item[price]"
size="30"
type="text"/></td></tr></table>
<div id="line_items">
</div>

<%= link_to_remote("Add Item", :update =>"line_items",
:url => {:action =>
:say_when}, :position => "bottom") %>
<!--[eoform:invoice]-->

Here is my controller say_when action in the invoice controller:

def say_when
render_text "
<table border=1>
<tr>
<td><input id=''line_item_description''
name=''line_item[description]''
size=''30'' type=''text'' /></td>
<td><input id=''line_item_price''
name=''line_item[price]'' size=''30''
type=''text''/></td>
</tr>
</table>"
end


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