[Zope] Ordered Folders

[Janko Hauser]

Itamar Shtull-Trauring writes:
 > Janko Hauser wrote:
 > >  > The first thing I need to create is a ZClass, inheriting from Folder, where
 > >  > the order of the objects it contains is persistent, and can be changed by
 > >  > the users.  That is, I want the user to be able to move the fifth object to
 > >  > be third in the list.
 > >
 > > The ZClass/Folder can have a simple lines property, which serves as a
 > > sheet where the order of objects can be edited.
 > 
 > But a regular Folder doesn't display the objects in it based on this
 > property.  So how do I make it display them according to this property, and
 > make sure that when I use the <dtml-in> tag it will also return the objects
 > in this order (the whole point of the excercise)?
 > 

So, where do you want to 'view' this ordered list? In the managment
interface? Or in a DTML method? The first one is more difficult as the 
management interface does not use a protokoll. 

But if you want to iterate in a DTML method with <dtml-in> than you
can ask the content_order property of that folder to return the id in
the given order.

You are in test, which has this property.

<dtml-in content-order>
<dtml-with sequence-item>
<dtml-var id><BR>
</dtml-with>
</dtml-in>

If your ordering can be expressed programmatically you can filter the
output of objectValues() and return a list with a simple external
method. 

HTH

__Janko