[Zope3-dev] Re: calling interface returns object, calling queryAdapter returns None?

[Jim Fulton]

On Jan 24, 2007, at 5:37 PM, Chris Withers wrote:

> Laurence Rowe wrote:
>>  From the Interface.__call__ docstring: "If an object already  
>> implements the interface, then it will be returned"
>> queryAdapter is looking in the adapter registry.
>> You have not registered any adapters.
>> So this looks like the expected behaviour to me.
>
> Documented maybe, expected no.
>
> queryAdapter, for me, is "starting with the supplied object, get me  
> something that implements the supplied interface and return None if  
> no such object can be obtained".
>
> If there's another function which does this, fine, if not, then I  
> maintain the current behaviour is not correct...

Chris, documented behavior is not incorrect just because you expect  
otherwise.

Jim

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