On 18 Jan 2007, at 09:53 , Chris Withers wrote:
Philipp von Weitershausen wrote:
If it is, then which of the following should I use to register a
generic adapter for any single object to an interface:
provideAdapter(...,adapts=(None,),...)
This one.
Given that you can register adapters for any class, whether or not
it implements any interface, this doesn't work as it should:
>>> from zope.component import provideAdapter
>>> def adapter(*args): pass
...
This is your problem. The 'adapter' function is a factory so it's
supposed to actually return the value of the adaption. If ITest(1)
returns None, then the component architecture thinks adaption has
failed. This is a well-known and intended behaviour.
>>> from zope.interface import Interface
>>> class ITest(Interface): pass
...
>>> provideAdapter(adapter,adapts=(None,),provides=ITest)
>>> ITest(1)
Traceback (most recent call last):
...
TypeError: ('Could not adapt', 1, <InterfaceClass __main__.ITest>)
>>> class test: pass
...
>>> ITest(test())
...
TypeError: ('Could not adapt', <__main__.test instance at ...>,
<InterfaceClass __main__.ITest>)
I have no idea what a "generic" adapter is, but the zope.component
API docs (== interfaces) are certainly complete in this sense.
There are also doctests.
Where can I find the docs and interfaces you mention above? I
looked through both zope.interface and zope.component and obviously
missed them :-(
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