[Zope] DTML vs ZTP

[Paul Winkler]

On Wed, Dec 15, 2004 at 02:15:34AM +0100, Jaroslav Lukesh wrote:
> Dne pond?l?, 13. prosince 2004 17:45 Florent Guillaume napsal(a):
> >
> > Well there's always a way to hack it in using structure, like in:
> >
> >   <table>
> >     <tr>
> >       <tal:block repeat="item mydatalist">
> >       <td tal:content="item/title_or_id">Title</td>
> >       <div tal:condition="python:repeat['item'].index % 4 == 3"
> >            tal:replace="structure string:</tr><tr>" />
> >       </tal:block>
> >     </tr>
> >   </table>
> 
> nice piece, but it broke main idea of ZPT - separation design from logic. BFU 
> designer could easily broke that code.

Yeah it smells too funny to me.
I'd rather wrap it up in a trivial and reusable script:

##parameters=data,batchsize
"""
Break up list *data* into sub-lists of size *batchsize*.
"""
indeces = range(0, len(data), batchsize)
result = [data[i:i+batchsize] for i in indeces]
return result


This makes the template relatively clean and concise:

   <table>
     <tr tal:repeat="row python:myscript(mydatalist, 4)">
	<td tal:repeat="item row" 
	    tal:content="item/title_or_id">Title</td>
     </tr>
   </table>


-- 

Paul Winkler
http://www.slinkp.com