Chris Withers wrote at 2008-12-13 10:42 +:
> ...
> From looking at the python implementation of Interface, __call__ is
>indicated to be the method to override, but with the C-based Interface,
>this has no effect. Why is that?
>
>*That's* what I'm looking for help with, not judgement on whethe
Gareth Bult wrote:
> I'm having a bit of a problem that looks like a 32 bit vs 64 bit issue
> with RelStorage, can anyone help?
We need to get more people to use RelStorage so more people can help. :-)
This looks like a good clue:
> ==
Chris Withers simplistix.co.uk> writes:
>
> Hi All,
>
> I have a need to be able to adapting certain objects to None, eg:
>
> def some_adapter(obj):
>if something:
> return None
>return somethingelse
>
> This is tricky, since returning None from an adapter results in a TypeError.
Summary of messages to the zope-tests list.
Period Fri Dec 12 12:00:00 2008 UTC to Sat Dec 13 12:00:00 2008 UTC.
There were 6 messages: 6 from Zope Tests.
Test failures
-
Subject: FAILED (failures=2) : Zope-trunk Python-2.4.5 : Linux
From: Zope Tests
Date: Fri Dec 12 20:37:00 EST 200
On Sat, Dec 13, 2008 at 10:42:09AM +, Chris Withers wrote:
> Dieter Maurer wrote:
> > Then, use something different from adaptation (as adaptation does
> > not fit your wishes).
>
> This is what I'm trying to do with subclassing, and my question was why
> that subclassing wasn't working...
S
Dieter Maurer wrote:
> Then, use something different from adaptation (as adaptation does
> not fit your wishes).
This is what I'm trying to do with subclassing, and my question was why
that subclassing wasn't working...
> I expect that your adapter factory can raise "ComponentLookupError"
> when
Chris Withers wrote at 2008-12-13 10:18 +:
>Dieter Maurer wrote:
>> I think that in some cases, it would be useful for an adapter factory
>> to say 'I cannot handle this case' and then the adapter lookup
>> is continued. Maybe, this is already supported?
>> Then, maybe, you can use it?
>
>That'
Dieter Maurer wrote:
> I think that in some cases, it would be useful for an adapter factory
> to say 'I cannot handle this case' and then the adapter lookup
> is continued. Maybe, this is already supported?
> Then, maybe, you can use it?
That's exactly what returning None indicates...
>> def som
Chris Withers wrote at 2008-12-13 02:17 +:
>I have a need to be able to adapting certain objects to None, eg:
>
>def some_adapter(obj):
> if something:
> return None
> return somethingelse
Your use case seems to abuse adaptation:
Adaptation to an interface must always return an obje
