[Zope-dev] Question about using CatalogAware

[Kevin Dangoor]

Greetings,

    I've got a ZClass with ObjectManager and CatalogAware as base classes
(in that order). I'd like to make a DTML Method (in the ZClass) that
searches the catalog. Here's the method:

<dtml-call "REQUEST.set('topurl', PARENTS[0].absolute_url())">
<dtml-if "category == 'top'">
 <dtml-call "REQUEST.set('searchfor', {'metatype' : 'KMArticle', 'top' :
'on', 'current' : 'on'})">
<dtml-else>
 <dtml-call "REQUEST.set('searchfor', {'metatype' : 'KMArticle', 'category'
: category, 'current' : 'on'})">
</dtml-if>
<dtml-in "_[default_catalog](searchfor)" sort=score>
<dtml-if "release.isPast()">
 <dtml-var list_item>
<dtml-else>
 <dtml-if sequence-start>
  <dtml-call "REQUEST.set('nofirst', 1)">
 </dtml-if>
</dtml-if>
</dtml-in>

And I get the following error:

  <STRONG>Error Type: AttributeError</STRONG><BR>
  <STRONG>Error Value: no __call__ method defined</STRONG><BR>

From the traceback:
    (Object: _[default_catalog](searchfor))
  File &lt;string&gt;, line 0, in ?
AttributeError: (see above)

A test DTML Method showed me that default_catalog = 'Catalog'. I have a
ZCatalog called 'Catalog' in the Zope root. Since the ZClass is an Object
Manager, the Method is one level down and will have to acquire the catalog.

If I replace "_[default_catalog](searchfor)" with "Catalog(searchfor)", the
method works.

Any ideas what I'm doing wrong?

Thanks,
Kevin