Sounds like the script should check to see if the user is removing something like:
<input type="checkbox" name="remove" value="item-374623746">

if remove
remove the item
redirect back to the udpated form page
else
send to PP

this way once the item is removed and the same script is called, since there's no remove this time, it'll go to PP.

On Aug 13, 2007, at 5:14 PM, tonylabarbara@aol.com wrote:

I'm trying to make a silk purse out of a pig's ear :)
I have a form where purchasers can deselect items they've added to their shopping cart. All the hidden fields have been numbered according to the items they *originally* selected. If they deselect an item, then it will probably necessitate a renumbering of all those hidden fields, since PayPal doesn't tolerate misnumbering: everything must be numbered "1" for all the hidden fields of the first product, "2" for the second, etc. If the customer selects 5 products and deletes the 3rd, then I need to renumber. I wrote a script that can do that. Now, I have to send the form to that script, with all its lovely hidden fields, then reproduce it somewhere so I can send it off to PP. That is, the form must return from the called script to a new page and deliver all the renumbered hidden fields.
TIA,
Tony


-----Original Message-----
From: Tom Von Lahndorff <tom@modscape.com>
To: tonylabarbara@aol.com
Cc: lists@zopyx.com; zope@zope.org
Sent: Mon, 13 Aug 2007 4:59 pm
Subject: Re: [Zope] Form-Through-Script

can you describe what you're trying to do a little more clearly?

On Aug 13, 2007, at 4:29 PM, tonylabarbara@aol.com wrote:

Well it didn't like that, either:
 
Invalid request
The parameter, doc, was omitted from the request.

again. But look here:

<td tal:define="docs here/CheckOutAfterEditStuff">
<form action="renumberTheCart(docs)" method="post" enctype="multipart/form-data">
<p metal:use-macro="here/CheckOutAfterEditStuff/macros/main" />

See, I have a definition of "docs", but it's not pointing to a "use-macro" widget. Must be the problem, but how do I do that?
TIA,
Tony

-----Original Message-----
From: Tom Von Lahndorff <tom@modscape.com>
To: tonylabarbara@aol.com
Cc: lists@zopyx.com; zope@zope.org
Sent: Mon, 13 Aug 2007 4:20 pm
Subject: Re: [Zope] Form-Through-Script


I think you want:

<form action="renumberTheCart(here/CheckOutAfterEditStuff)" method="post" enctype="multipart/form-data">
<td>
<form action=http://example.com/s/renumberTheCart" method="post">
<input type="hidden" name="doc" value="" tal:attributes="value here/CheckOutAfterEditStuff" /> 
<p metal:use-macro="here/CheckOutAfterEditStuff/macros/main" /> 
</td>

(my tal may be a bit off)


On Aug 13, 2007, at 4:09 PM, tonylabarbara@aol.com wrote:

No, it should work the way it is...that is a URL I passed. I changed it to an absolute URL just to double-check, and got basically the same error:
 
Invalid request
The parameter, doc, was omitted from the request.

How do I pass the parameter, which in my case is quite long and stashed neatly away in a PT macro?

<td tal:define="docs here/CheckOutAfterEditStuff">
<form action=http://example.com/s/renumberTheCart?doc=docs" method="post"> 
<p metal:use-macro="here/CheckOutAfterEditStuff/macros/main" /> 
</td>

TIA,
Tony

-----Original Message-----
From: Andreas Jung <lists@zopyx.com>
To: tonylabarbara@aol.com; zope@zope.org
Sent: Mon, 13 Aug 2007 3:55 pm
Subject: Re: [Zope] Form-Through-Script

 
--On 13. August 2007 15:39:40 -0400 tonylabarbara@aol.com wrote: 
 
> 
> Hi; 
> I have a form that I need to send to a script and then send off to a URL 
> (PayPal). I need to process it through the script to renumber things for 
> PP. How do I do this? I imagine I add an element to the PT like so: 
> 
> <form action="renumberTheCart(here/CheckOutAfterEditStuff)" method="post"> 
> 
> but I need to pass a parameter "doc", which, of course, is the document 
> I'm submitting. So I tried this: 
> 
> <form action="renumberTheCart(here/CheckOutAfterEditStuff)" method="post"> 
> <p metal:use-macro="here/CheckOutAfterEditStuff/macros/main" /> 
 
You might check out the basics about HTML forms first. The 'action' parameter is an URL and *not* some Python-like function call. You specify the destination URL inside the action attribute and pass the parameters as *hidden* form parameters to the URL - either using method GET or POST. 
 
You'll find more on forms in any HTML tutorial. Start from here: 
 
<http://www.w3schools.com/html/html_forms.asp> 
 
-aj 
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