[Zope] Data aggregation within a tree

[Dieter Maurer]

Brad Knotwell writes:
 > My application has two custom objects types (one of them is
 > folderish).  I'm trying to add a view to the folderish object that'll
 > aggregate statistics information on the lower-levels of the tree.
 > 
 > Specifically, I'd like a flavor for how to do the following:
 > 
 >     traverse a tree w/o rendering it
 >     test an object's type
 >     if an object is a specific type:
 >        update counters appropriately based on the internal state of
 >        the object
 > 
 >     render the results
 > 
 > Since I only want to traverse the tree (not render it), am I correct 
 > in presuming dtml-tree isn't my friend in this case and I'll need to
 > work in straight Python instead?
You are correct.

Look at the code of "OFS.FindSupport.ZopeFind" and see how it implements
traversal.

Do the same in either an External Method or a Python Script (here
several access restrictions will apply).


Dieter