[Zope] Test if an object exists in a folder

[Hans Sandsdalen]

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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