[Zope-dev] broken selection property support in z2.2

[R. David Murray]

On Tue, 27 Jun 2000, Brian Lloyd wrote:
> The 'selection' and 'multiple selection' properties are 
> really built with the idea that you use another property 
> *of the same object* (rather than an acquired value) to 
> bind the selection to. Your change works for your case, 
> but if you try to bind to another property of the same 
> ZClass you'll find that in your management screens that 
> your selection property will fail (because it is looking 
> in '_' for the value, which is the wrong place to look 
> if you are expecting to find the value as another property 
> of the same object.

It used to work both ways.  I know because I first implemented
a selection property with another property on the same object,
and later moved it to a property on the root.  I did this
because otherwise my custom Product add method couldn't
access the selection value property that was on the ZClass
property sheet.  (I think I could probably figure out how
to make that access now, but then I couldn't).

Anyway, the point I'm leading up to is, if you ignore implementation
issues, isn't restricting the value field to being a property on
the same object being unecessarily restrictive?  Surely there can
be cases where you want the value field to be acquirable.  Of
course, there should be a way to specify that it be the same, for
cases where you *don't* want acquisition to work.

--RDM