[Zope] how: passing a list as a hidden variable from doc to doc

[Jason Spisak]

Heiko Stoermer:

You pass them as multiple hidden fields like so:

<dtml-in del_list>
<input type=hidden name=del_list:list value="<dtml-var sequence-item>">
</dtml-in>

> Hello Zopistas,
> I've come across this problem, (which delays my whole project and upsets
> my employer):
> 
> I have a Form that displays a list of files for deletion and a checkbox
> for each file to select it:
>   <dtml-in "prjfolder.objectIds('File')" skip_unauthorized>
> 	<input type=checkbox name=del_list value=<dtml-var sequence-item>>
>   [...]
> 
> Users can check the files they want to delete. They submit the form to
> the next dtml-method, say "delete". all checked filenames are passed to
> this method as a list object, e.g.: ['file1', 'file2', 'file3'].
> If I pass this list object to manage_delObjects(del_list), everything
> goes fine. The objects are deleted.
> 
> Logical flow:
> select -> delete
> 
> BUT:
> I have to ask the user if he really wants to delete the files.
> Thus:
> select -> ask -> delete
> 
> So I need to pass the list of filenames through that darn "ask"
> document.
> There I did something like:
> 	<input type=hidden name=del_list:list value="<dtml-var
> "REQUEST['del_list']">">
> this renders to:
> 	<input type=hidden name=del_list:list value="['file1', 'file2',
> 'file3']">
> (Note: I did the :list type conversion. I also tried tokens, lines,
> whatever...)
> 
> If the user chooses to delete, I finally call my delete document, which
> is supposed to delete the files in the list.
> but the call to manage_delObjects(del_list) fails with:
> 	Error Value: ['file1', 'file2', 'file3'] does not exist
> 
> How do I pass a list object from one document to another? It always
> somehow becomes a string, breaking everything. There must be a clean
> way; I do not want to do string magic with split or so.
> 
> Anyone help me out, please.
> 
> 
> thanks in advance,
> Heiko
> 
> -- 
> heiko.stoermer@innominate.de
>                                                         innominate AG
>                                                      networkingpeople
> fon: +49.30.308806-0 fax: -77               web: http://innominate.de
> 
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Jason Spisak
CIO
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