[Zope-Coders] Re: [CMF-checkins] CVS: CMF/CMFStaging CMF/CMFStaging - Imported sources

[Florent Guillaume]

Brian Lloyd <brian@zope.com> wrote:
> ...you'll see a getVersionOfResource call (that is implemented by
> the Repository). You could pretty easily implement a traversal
> hook to get directly addressable versions. A quick, untested
> example:

Ok thanks a lot. I hadn't looked deep enough at that part.
Thanks for the sample code too.

Very interesting indeed ;-)

Florent


> class FolderThatSupportsVersionURLs(Folder):
> 
>   def __bobo_traverse__(self, REQUEST, name=None):
>       # Split the object name and version info, and get
>       # the named object.
>       version_id = None
>       parts = name.split(';')
>       if len(parts) > 1:
>           name = parts[0]
>           version_id = parts[1]
> 
>       # Note I'm omitting some error checking :)
>       theObject = getattr(self, name)
> 
>       # Get the ref to the repository somehow, and get the
>       # version info (bookkeeping) for the object we need a
>       # version of. We'll need the history_id (identity within
>       # the repository) to get an arbitrary version using the
>       # getVersionOfResource api.
>       repository = self.getRepository()
>       info = repository.getVersionInfo(theObject)
>       history_id = info.history_id
> 
>       # Get the requested object version from the repository
>       theVersion = repository.getVersionOfResource(
>                      history_id,
>                      version_id
>                    )
> 
>       # Do acquisition wrapping of the version of the object.
>       return theVersion.__of__(self)
-- 
Florent Guillaume, Nuxeo (Paris, France)
+33 1 40 33 79 87  http://nuxeo.com  mailto:fg@nuxeo.com