[Zope] dtml-with and only

[Barry A. Warsaw]

Thanks for the suggestion and explanation guys.  Just to follow up,
Michel's suggestion to use <dtml-with aq_explicit> to turn off
acquisition did not work.  Loren's suggestion to test on
"hasProperty('nickname')" did the trick nicely.  For completeness,
here's the DTML for my current Breadcrumbs DTML method.

-Barry

-------------------- snip snip --------------------
<!-- start Breadcrumbs -->
<dtml-call "REQUEST.set('rev', [])">
<dtml-in PARENTS skip_unauthorized>
  <dtml-let item=sequence-item>
    <dtml-call "rev.insert(0, item)">
  </dtml-let>
</dtml-in>
<dtml-in rev>
  <dtml-with sequence-item>
    <a href="<dtml-var absolute_url>">
    <dtml-if "hasProperty('nickname')"><dtml-var nickname><dtml-else><dtml-var title_or_id></dtml-if></a>
  </dtml-with>
  <dtml-unless sequence-end>&nbsp;&gt;&nbsp;
  </dtml-unless>
</dtml-in>
<!-- end Breadcrumbs -->