[Zope] Avoiding acquisition aka testing for contained objects

[Stefan H. Holek]

If I want to know whether a certain object is contained in 
the current folder I do this:

<dtml-if "'index_html' in this().objectIds()">
  yes it's here
<dtml-else>
  not here
</dtml-if>

Id like to know whether this is the best/most efficient way to do it.
Things like hasattr() are subject to aquisition i.e. they would find
an index_html method along the acquisition path; something I do not 
want. I also cannot bracket everything in a <dtml-with ... only> because
chopping my namespace is not what I want either.

TIA,
Stefan

--
Things work better when plugged in