"Bowyer, Alex" wrote:

Hi,

I have what I'm sure is a very simple question about Zope programming style: I want to count how many objects are contained in the current container object and then do something with that value, but I can't do the bit I need to do at the point of reading the count variable because I am in the wrong namespace. I can't begin a dtml-let because I would need to close dtml-if before dtml-let, which is not allowed.

<dtml-in objectValues> <dtml-if sequence-end> <dtml-var count-id> <!-- this is the value I want to use --> </dtml-if> </dtml-in> <!-- this is the scope in which I want to do something with the value. -->

try (untested): <dtml-call expr="REQUEST.set('countids', _.len(objectValues())"> <dtml-in objectValues> <dtml-if sequence-end> <dtml-var countids> </dtml-if> </dtml-in> <!-- do something with the value. -->

What is the "accepted" way of passing a value into a different scope? Do I have do a REQUEST.set or is there a tidier way?

<dtml-let>

Also I think I read somewhere that you can use the object.subobject or object.property syntax but I never got that to work, what's the catch?

<dtml-var expr="object.subobject"> note that this is a Python expression and the code between quotes has Python behaviour.

One last thing, I sent a couple of mails to the list about problems I had with manage_delObjects. I still haven't got it to work. Since the best way to learn Zope is by example, I wonder if anyone could direct me to a sample piece of code where a container of some sort deletes one of its children subobjects?

try (untested): <dtml-call "<subobject>.manage_delObjects([id1, id2, ..])"> hth Rik