On Sun, Apr 12, 2009 at 10:31 AM, <glyph@divmod.com> wrote:
On 11 Apr, 08:41 pm, esteve@sindominio.net wrote:
factory = IFooFactory(myService) factory.bar = "some value"
it works, but I'd rather use this:
factory = IFooFactory(myService, configurationObject)
This is a long and terrible road you're about to start down. It's hard for me to explain exactly why it's so painful, but trust me, it is.
What you're doing now, passing out-of-band arguments to the IFooFactory adapter, whose concrete type you are *not supposed to know* at that point in the control flow, is bad. But trying to force adaptation to become full-fledged multimethods is worse. If you want multimethods, I believe PEAK provides a package that implements them.
Also, Zope has getMultiAdapter(). The canonical example is adapting a model object and a request object to a view object. I don't think it's as bad as glyph says. I probably wouldn't use it in the case you describe -- calling methods on objects is almost always better. jml