[Zope-dev] Re: Zope 2.9.3 release

[Tres Seaver]

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Dieter Maurer wrote:
> Tres Seaver wrote at 2006-4-19 15:30 -0400:
> 
>>...
>>
>>>Is Alec's traversal patch or Dieter's alternative being considered?
>>
>>I'll note that I have a client who can't move forward from 2.9.1 to
>>2.9.3 because the changes to traversal semantics in that release break
>>every view lookup in the application (which was originally built on
>>2.8.x, and works fine on 2.9.1.
> 
> 
> I would like to stress that "my alternative" does not change traversal
> semantics but provides a way for "knowing" component's 
> "__bobo_traverse__" to tell the enclosing framework that
> "__bobo_traverse__" wants to use the default (and not do anything special).
> Nothing is changed until a given component uses the feature.

I think the only impact on a site without software which used the
feature would be a tiny performance ding (having to wrap the
'__bobo_traverse__' call with a 'try:...except:' block).  OTOH, since
the contract for '__bobo_traverse__' is already insane (it *has* to
behave differently for publishing traversal than for "normal"
traversal), perhaps this change would reduce that insanity.

We need to tweak OFS.Traversable as well, given that it calls
'__bobo_traverse__' too.

+1 for including the patch in the release tree.


Tres.
- --
===================================================================
Tres Seaver          +1 202-558-7113          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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