[Zope3-dev] Should containers tell you if they accept empty string keys?

[Florent Guillaume]

Guido van Rossum  <guido@python.org> wrote:
> > > In particular, if you pass the returned key to another call to
> > > setObject(), will it overwrite the object whose setObject() call
> > > returned that key, or will it generate a new key again???
> > 
> > If the container doesn't ignore the key, it will generate a
> > DuplicationError.
> 
> Ah, so setObject() can't be used to overwrite an existing object.
> That simplifies things.

Note that Zope 2 objects have the option to declare
    __replaceable__ = Globals.REPLACEABLE
to allow themselves to be overwritten by another object with the same id.

However I don't know what it's used for in Zope 2, and if it's a planned
feature for Zope 3.

Florent

-- 
Florent Guillaume, Nuxeo (Paris, France)
+33 1 40 33 79 87  http://nuxeo.com  mailto:fg@nuxeo.com