At 01:01 PM 11/7/00 +0200, Roch'e Compaan wrote:
I created a couple of ZClasses based on Dataskin.
In the way I grok ZOPE, properties that are objects can not go onto property
sheets. So if I have a Customer ZClass that has a property Address (a
property that is an object) then I would create the address object as a
"method" of the Customer that makes references like Customer.Address.Street
possible.
The way Ty and I usually handle "object" properties is to give an object
setter methods (e.g. "setAddress()") that simply set the property (e.g.
self.Address = addr). The only downside is that you have to do this in a
Python base class or an External method. Later, we expect to replace this
approach with PropertyHandlers, and we already have a primitive form of
PropertyHandler we have used with some success, but it's too crude at this
point for a product release.
To achieve this without ZPatterns I would base my ZClass on a objectmanager
so that I can create an instance of an Address object within Customer. So
how does one do this with ZPatterns. In one posting I picked up that one
does not have much joy with ZPatterns and the ObjectManger base class?
I have created ObjectManager and Folder dataskins before and had them work,
but at the time I was testing with Zope 2.1.6, and it was an older version
of ZPatterns. I haven't done much lately with them. If people are
experiencing problems, perhaps someone could send me a bug report?
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