On Mon, Jul 03, 2000 at 10:38:27PM +0200, Dieter Maurer waxed eloquent:
> Charlie Wilkinson writes:
> > On Mon, Jul 03, 2000 at 09:35:06AM +0200, Rik Hoekstra waxed eloquent:
> > >
> > > Charlie Wilkinson writes:
> > [...]
> > > I'm trying to use dtml-tree to create a selective menu of objects based
> > > on whether or not the object has an "add_to_menu" property.
> > [...]
> > > [rh]
> > > Try (yes, this is tested):
> > > <dtml-call "REQUEST.set('ret', '')">
> > > <dtml-in "objectValues()" sort=id>
> > > <dtml-if "_.has_key('add_to_menu')">
> > > <dtml-call "ret.append(id)">
> > > </dtml-if>
> > > </dtml-in>
> > > <dtml-return ret>
> > >
> > The bigger problem seems to be the namespace issue that Dieter was
> > speaking of.
>
> I found a solution that is much easier than hacking the
> TreeDisplay code:
>
> You do not plan to use REQUEST for information about the
> request but only as a container for a temporary list.
> This can be achieved without REQUEST
>
> <dtml-with "_.namespace(r=[])">
> <dtml-in "objectValues()" sort=id>
> <dtml-if "_.has_key('add_to_menu')">
> <dtml-call "r.append(_.getitem('sequence-item'))">
> </dtml-if>
> </dtml-in>
> <dtml-return r>
> </dtml-with>
Lots of good ideas, thanks guys! However, I'm still getting an attribute
error on __getitem__. I'm trying to figure out how namespaces get passed
around in Python to see if there's an easy way to fix this.
I've also found a workaround and pondered another:
- pass ['Folder','DTML Document'] to optionValues the normal way, i.e.:
<dtml-tree branches_expr="objectValues(['Folder','DTML Document'])"
skip_unauthorized="1">
<IMG SRC="<dtml-var SCRIPT_NAME>/<dtml-var icon>">
<dtml-if "meta_type == 'Folder'">
<dtml-var title_or_id>
<dtml-else>
<A HREF="<dtml-var tree-item-url>" TARGET="main"><dtml-var title_or_id></A>
</dtml-if>
</dtml-tree>
...and then simply use DTML Documents and *only* DTML Documents for
stuff I want in the tree menu, primarily CGI forms, some of which might
be dynamically generated. I guess if I smack into any limitations with
DMTL Documents, I'll have a Document call a method. It's not ideal, but
it seems workable enough.
The other alternative might be to use ZCatalog with the Tree tag somehow.
I think it might do what I need, but I haven't given it much thought.
That said, I still think the idea you and Rik have been helping me
with is the most "elegant", but I've got a big site to build and very
little time. Would it be any easier if instead of a DTML Method I used
an ExternalMethod as a wrapper/filter around objectValues?
It's very frustrating, as I keep thinking there's *got* to be an easy
way to fix this if I only had a half a Zope/Python clue. I'm already
reading about as fast as I can!
Regards,
Charlie
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