On Thu, 28 Feb 2002, jkinsley wrote:

How can I add a subobject to a container where the subobject id is the same as a container property so that the subobject will be used instead of the the container property? Is this a good idea, and/or is there a better way?

class Container(...ObjectManager, PropertyManager...) """A Folderish Object Product """

...

_properties = ( {'id:'title', 'type':'string', 'mode':'w'}, {'id:'default', 'type':'string', 'mode':'w'}, )

...

__init__(self, id, title='', default=''): self.id=id self.title=title self.default=default

...

Now in Zope I add a 'Container' object with id ZContainer and set ZContainer.default = 'The default value.' In most instances this is sufficient, but on occassion is is necessary to get the value of content from a more complex object such as a Document. In such a case I would like to be able to simply add a Document object to ZContainer with 'default' as its id so that when ZContainer.default is called, the contents of the Document are returned instead of the value of the default property. If this is not a good idea, what are the alternatives?

So, right now, ZContainer returns the ZContainer.default rather than the ZContainer.objectValues()['default'] ? How about: * tweaking with the __of__ acquisition method for ZContainer to mangle requests for default to look in the right place (I'd be on slightly shaky ground about exactly how to code this, but I think it's a workable idea, and if so, would require no code change. Of course, it might have nasty side effects on attempts to set/delete the default property, mangling those to the default contained-object. Perhaps these could be routed around. Not sure.) * more simply, write a getDefault() property in ZContainer and calling that instead. This would do the checking and return the right thing. -- Joel BURTON | joel@joelburton.com | joelburton.com | aim: wjoelburton Independent Knowledge Management Consultant