[Zope-dev] Ordered Folder again

[Florent Guillaume]

Hi,

I'm sorry to revisit an problem that I see has been discussed to death 
last month, but I'd like to propose a change to what has currently been 
checked in about Ordered Folders into Zope 2.7.

What I often want is an easy way to migrate existing sites to the 
ordered version. So I would propose that all Folders have OrderSupport, 
but with the following change:

- in a folder, has_order_support would be either a boolean, or not 
present and thus found by acquisition
- the zope root would have has_order_support = 0
- OrderSupport.manage_renameObject would do its special stuff only if 
self.has_order_support is true
- dtml/main.dtml would test ordering with a simple
   <dtml-let hasOrderSupport=has_order_support>
- dtml/folderAdd.dtml would present the user with a choice to basically 
decide if has_order_support should be set, unset or acquired.
- manage_addFolder would take this additional argument and do nothing or 
create a property for has_order_support.

Thus the default behavior would be the same as today, but if a folder is 
created with the has_order_support property (or if it's set after 
creation), the subtree would then be ordered. In a CMS that's always 
what we want.

What do you think ? I think it gives the best of both worlds, as it's 
then very easy to migrate a site.

The only downside is, I think that products like BTreeFolder2 would have 
to add an has_order_support=0 class variable.

Florent

-- 
Florent Guillaume, Nuxeo (Paris, France)
+33 1 40 33 79 87  http://nuxeo.com  mailto:fg@nuxeo.com