[Grok-dev] Time for a global_adapter?

[Martin Aspeli]

Hi,

If I'm not missing something, it's not possible to do this without ZCML:

   from z3c.form.widget import ComputedWidgetAttribute(
   def getDefault(data):
       return "blah"

   DefaultValueProvider = ComputedWidgetAttribute(
		getDefault,  field=IMySchema['some_field'])

   <adapter factory=".DefaultValueProvider" name="default" />

That is - I'm using a factory (ComputedWidgetAttribute in this case) to 
obtain an adapter, which I then need to register under a name.

I could imagine something like:

   grok.global_adapter(DefaultValueProvider, name="default")

to mimic grok.global_utility().

Do we need something like this?

As I've said before, I also think we should support named @adapter 
decorators, e.g.

  @adapter(IFoo, name="foo")
  def foo(context):
      ...

although that's slightly different.

Martin

-- 
Author of `Professional Plone Development`, a book for developers who
want to work with Plone. See http://martinaspeli.net/plone-book