[Zope3-dev] adapter registration - sort of works :-S

[Chris Withers]

Hi All,

Chris Withers wrote:
> Jean-Marc Orliaguet wrote:
>> once you have that utility / adapter you should be able to call it like:
>>
>>   converter = getAdapterFor(123, type=IToStringConverter)
>>   strResult = converter.convert(123)
> 
> Not quite, what I'm looking to do is more along the lines of:
> 
> mystr = getAdapter(123,str)

OK, less talk, more do... and when I stop worrying about it, it all gets 
very easy:

 >>> from zope.component import provideAdapter
 >>> provideAdapter(str,(int,),str)
 >>> from zope.component import getAdapter
 >>> getAdapter(123,str)
'123'

Yay! That's _exactly_ what I want. Although it does suggest that 'adapt' 
should be provided as an acronym for 'getAdapter'.

Anyway, now all excited, I tried this:

 >>> def to_date(value):
...   try:
...     return DateTime(value)
...   except:
...     return None
...
 >>> provideAdapter(to_date,(str,int),DateTime)
 >>> getAdapter('2006/11/16',DateTime)
Traceback ...
...
zope.component.interfaces.ComponentLookupError:
('2006/11/16', <class DateTime.DateTime.DateTime at 0x00E73600>, u'')

wtf?

Chris

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