[Zope] Web pages as Object Classes

[Paolo Losi]

Johan Carlsson wrote:
> There are better Design Patterns than inheritance for doing the same 
> thing. (I am using a dekoration pattern myself where the dekor is a 
> template with a number of views).

Is decoration pattern a Carlsson's "trademark" or something "well 
known"? I couldn't find anything interesting with google...

> Zope it self uses the concept of run-time inheritance (e.g. acqusition).
> 
> Your base class would be your root-object, index_html in the root object
> is the base implementation of render() and it can call header, menu,
> login_status, content, footer. The sub-classes are object futher down
> the hieracy and every thing can be overriden in it.
> The problem with this approach is of course that implementation,
> data and hierarcy gets mixed up in an unfortunate combination.

Another problem is that i cannot use parameters with PTL or apply some
logic to them but... again... I would probably be mixing content and
presentation again :-)

> This problem has been taceled in many product, such as portal_skins (in 
> CMF) or the template system in EasyPublisher or by proxy/repository 
> implementations.
> 
> IMHO I think you would be better of understanding the power of Zope
> first and than look at what archtecture/patterns would suit you.

You're right. But I feel that trying to understand how to use features
while you're learning makes you learn faster! :-)

> That's my 25.cents anyway :-)
>

You've been very kind and helpful

	Ciao
	Pao