[Zope-CMF] Re: modifying TypeInformation's properties

[Jean-Marc Orliaguet]

yuppie wrote:

> Hi!
>
>
> Jean-Marc Orliaguet wrote:
>
>> Portlets are 100% content objects, not presentation objects, but they 
>> are not documents either..
>>
>> Then we have CMF types that are definitely not content types such as 
>> styles, layout modifiers, page blocks, .... These are 100% 
>> presentation objects, but the underlying logic is the same as with 
>> any other CMF type
>>
>> we have made a clear separation between content and presentation 
>> objects - see: 
>> http://cvs.nuxeo.org/cgi-bin/viewcvs.cgi/CPS3/CPSSkins/doc/CPS3-Integration.txt?rev=1.3&content-type=text/vnd.viewcvs-markup 
>>
>>
>> The current FTI in CMF is designed for document types mainly - for 
>> instance there is a 'discussion alllowed' property which only make 
>> sense in the context of a document or something that can be added 
>> comments too.
>
>
> Ok.
>
Hi!

>> So the current issue is about making it more flexible so that it does 
>> not make too many assumptions about the type of objects that it holds 
>> information about.
>
>
> What I still don't understand is why making it replaceable is not an 
> option. All these kinds of types seem to be well defined and need a 
> predictable interface to work with the related products.
>
> IMHO PropertyManager is useful to modify the properties of unique 
> objects, not of groups of objects.
>
>
> Cheers,
>     Yuppie
>

There is a notion in philosphy called defining something "in 
comprehension" (or "in intension")
This is what we do here: by setting an attribute on unique objects what 
we have achieved is that we have created a group of objects but we never 
ever need to know explicitly what objects are in the group.

we don't want an extensive list of portlets for instance stored 
somewhere - which would be a pain to manage.

this is why the property manager is used in this very case to define a 
group of objects that share the same property (the unique property of a 
group of objects). We are not interested in the properties of unique 
objects.

Cheers /JM