[Zope] Re: tal:repeat question

[Evan Simpson]

Kevin Carlson wrote:
> I wish to display a group of pictures in a 3 by 3 table.  I'm currently 
> doing that with the following dtml.  Can anyone suggest how to do this 
> in TAL?

Unlike DTML, TAL doesn't try to build this sort of capability in, since 
it tends to become a mini-language.  Instead, you can use the utility 
classes and functions in ZTUtils.

Here is how I would write your example without using a Script (untested):

<table tal:define="qs request/query_start;
                    images python:objectValues('Image');
                    x3 python:range(3)">
   <tr width="33%" tal:repeat="row x3">
     <td class="photo_title"
      tal:repeat="col x3" tal:on-error="nothing">
<img src="example.gif"
  tal:replace="structure python:images[qs + row * 3 + col]" />
     </td>
   </tr>
</table>

> I know one way would be to call a python script that populated a list of 
> lists containing the necessary objectValues, but I am curious as if that 
> is the most efficient and/or only way.

It would certainly make for a tidier template:

<table>
   <tr width="33%" tal:repeat="row here/image_batch">
     <td class="photo_title" tal:repeat="image row">
<img src="example.gif" tal:replace="structure image" />
     </td>
   </tr>
</table>

Cheers,

Evan @ 4-am