Hi I want to use dtml. I tried these to check if content_html exists: 1: <dtml-if expr="_.has_key('content_html')"> Action! <dtml-else> Does not exist </dtml-if> 2: <dtml-in expr="objectValues()"> <dtml-var getId><br> <dtml-if expr="getId() == 'content_html'"> Action! </dtml-if> </dtml-in> I'm not sure of the syntax of expr in the first example. The second one works, but it seems a like overkill to me. And how do I now later that I found it? The dtml code below is not what I want, because it returns true when a parent object has "content_html". On Wed, 2002-07-31 at 15:05, Max M wrote:

Hans Sandsdalen wrote:

...

I'm new to zope, and I can't figure out how to check if an object (with a spesific name) exists in the current folder.

It kind of depends on where you want to check from. dtml, Python Script, Python product/external method or what have you.

dtml: <dtml-if someObj> <dtml-var showStuff> </dtml-if>

Python: if self.someFolder.has_key('someObj'): showStuff()

regards Max M

--

"Sorry I would Really Like To Help More On This Project, But Am To Busy Doing Paid Work On A Tight Deadline" Max M

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Max M writes:

... <dtml-if "aq_base.content_html()"> This will not work:

"aq_base" is not available in TTW code. The code above would raise an exception, when "content_html" is not an attribute of "aq_base". You come near (but it may fail in some circumstances) with <dtml-if "_.hasattr(aq_explicit,'content_html')"> Dieter