[Zope3-dev] Containment constraints

[Jim Fulton]

Roché Compaan wrote:
> * Sidnei da Silva <sidnei at awkly.org> [2003-12-23 22:14]:
> 
>>On Tue, Dec 23, 2003 at 09:57:48PM +0200, Roché Compaan wrote:
>>| The containment constraints are yummy. Just one thing I am concerned
>>| about is that the current implementation (__setitem__.precondition on an
>>| Interface) may lead to a lot of dead chickens. I seem to be ending up
>>| with a lot of interfaces that only subclass IContainer and set
>>| preconditions. Add to that the class implementation and ZCML one has to
>>| write for each interface and the dead chickens start to smell.
>>| 
>>| Should I just get used to it or am I missing some zen.
>>
>>I'm almost sure you can use a 'smarter' precondition that would be
>>reusable over all your folderish content. And also, that you may not
>>need to write an interface for each folderish object, unless you need
>>a marker interface for attaching a view, in which case I think you can
>>just register a view for a class now.
> 
> 
> Yes you're right. I was fixated on the existing ItemTypePrecondition -
> thanks for the nudge, I got my focus back ;-)

Hm, I have no idea what you two are talking about. :)

Jim

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