[Zope] Union of a few folders

[Steve Alexander]

Sin Hang Kin wrote:
> 
> I have some folders : news, events, activities, etc, which each of them have
> some items.
> 
> The application will generate a list of them in reverse date order. This
> have been done.
> 
> Now, I would like to add a new listing : to list all of them in reverse date
> order. i.e., I need to make a union of them first, then sort them. Is it
> possible to do this?

If you're makeing a number of different lists of these same items, it is
worth indexing them in a ZCatalog, and the using the ZCatalog to do the
presentation of your lists.

See the ZCatalog Tutorial:

  http://www.zope.org/Documentation/How-To/ZCatalogTutorial

--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net