[Zope] How do I check for existence of a page?

[Joel Burton]

On Wed, 28 Feb 2001, Casey Duncan wrote:

> Joel Burton wrote:
> > 
> > We have our staff listed under /staff, so that you might find me as
> > /staff?staffname=joel
> > 
> > I'd like the return page from this method to check if I have a
> > homepage on the site, and if so, provide a link. Right now, I'm doing
> > this as:
> > 
> > <dtml-in "PARENTS[1].home.objectIds(['Folder'])">
> >   <dtml-if "_['sequence-item']==staffname">
> >     <a href="/home/&dtml-staffname;">There is a home page</a>
> >   </dtml-if>
> > </dtml-in>
> > 
> > (cycle through folders under the '/home' directory, check the seq-id
> > against my name, and if so, generate a link.)
> > 
> > Is there a cleaner way to do this?
> > 
> 
> <dtml-with name="home" only>
> 	<dtml-if expr="_.hasattr(home, staffname)">
>      		<a href="/home/&dtml-staffname;">There is a home page</a>
> 	<dtml-else>
> .		No home page found.
> 	</dtml-if>
> </dtml-with>
> 
> or
> 
> <dtml-with name="home" only>
> 	<dtml-try>
> 		<a href="<dtml-var expr="_[staffname]" url>">There is a home page</a>
> 	<dtml-except KeyError>
> 		No home page found.
> 	</dtml-try>
> </dtml-with>
> 
> hth

Thanks, Casey!

Another way from a private respondant:

<dtml-if "restrictedTraverse('/home/' + name, _.None)">
  <a href="/home/&dtml-name;">There is a home page</a> 
<dtml-else>
  This staff member doesn't have a home page on this site.
</dtml-if>

-- 
Joel Burton   <jburton@scw.org>
Director of Information Systems, Support Center of Washington