On Mon, 2011-06-13 at 10:08 +0100, Chris Withers wrote: > On 12/06/2011 21:48, Chris McDonough wrote: > > Currently if you ask a registry to singly-adapt an object to an > > interface, and the object you're trying to adapt implements that > > interface, here's what happens: > > > >>>> from zope.component.registry import Components > >>>> c = Components() > >>>> from zope.interface import Interface, implements > >>>> class IFoo(Interface): pass > > ... > >>>> class Foo(object): > > ... implements(IFoo) > > ... > >>>> foo = Foo() > >>>> c.queryAdapter(IFoo, foo) > > <None> > > Looking back in history: > > https://mail.zope.org/pipermail/zope-dev/2008-August/032902.html > > I guess one or other of us has the parameter order wrong, probably me. > > Much thread ensued: > https://mail.zope.org/pipermail/zope-dev/2008-August/thread.html#32902 > https://mail.zope.org/pipermail/zope-dev/2008-September/thread.html#33174 > > Some justification for keeping the status quo from Fred: > > https://mail.zope.org/pipermail/zope-dev/2008-September/033172.html > > I stand by my resultant request here: > > https://mail.zope.org/pipermail/zope-dev/2008-September/033170.html > > Maybe less people care about ZCA now and so we might actually get > sensible changes made.
This argument against makes sense to me: https://mail.zope.org/pipermail/zope-dev/2008-August/032908.html So I've added a method to a subclass of zope.component.registry.Components for my own purposes: def queryAdapterOrSelf(self, object, interface, default=None): provides = providedBy(object) if not interface in provides: return self.queryAdapter(object, interface, default=default) return object - C _______________________________________________ Zope-Dev maillist - Zope-Dev@zope.org https://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - https://mail.zope.org/mailman/listinfo/zope-announce https://mail.zope.org/mailman/listinfo/zope )
