[Zope] obtaining properties from next / previous batch sequence-item?

[Uwe Schuerkamp]

On Wed, May 08, 2002 at 09:04:25AM -0500, John Hunter wrote:
> >>>>> "Uwe" == Uwe Schuerkamp <uwe@schuerkamp.de> writes:
> 
>     Uwe> Hi folks, I am looking for an easy way to access properties
>     Uwe> from previous or next objects in a <dtml-in>-generated batch
>     Uwe> output.
> 
> See the section 'Batch Processing With The In Tag' in the chapter
> 'Variables and Advanced DTML' in The Zope Book.
> 
> http://www.zope.org/Documentation/ZopeBook/AdvDTML.stx
> 
> The Appendix A of that book, in the DTML reference of the 'in'
> tag, gives you further information
> 
> http://www.zope.org/Documentation/ZopeBook/AppendixA.stx
> 
> John Hunter

Hi John,

thanks for your pointers. I know extract the title attribute by iterating 
using something like this: 

<dtml-if previous-sequence>
   Previous:<a href="<dtml-var URL>
   <dtml-var sequence-query>query_start=<dtml-var previous-sequence-start-number>">
   <dtml-in  expr="pictures.objectValues()" size=1 start=previous-sequence-end-number>
   <dtml-var title></a>
   </dtml-in>
</dtml-if>
&nbsp;
<dtml-if next-sequence>
Next:<a href="<dtml-var URL>
<dtml-var sequence-query>query_start=<dtml-var next-sequence-start-number>">
<dtml-in  expr="pictures.objectValues()" size=1 start=next-sequence-start-number>
<dtml-var title></a>
</dtml-in>
</dtml-if>

While this works it looks rather clumsy, and I guess there must be a
more elegant solution to this problem, no?

Thanks in advance,

Uwe 

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Uwe Schuerkamp               Tel: +49 (0)5241 / 80 10 66, FAX: - / 6 23 38
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