[Zope3-Users] How to access "request" variable from vocabulary

[Hermann Himmelbauer]

Am Montag, 6. August 2007 19:08 schrieb Benji York:
> Adam Groszer wrote:
> > I'm using something like this:
> >
> > def getCurrentRequest():
> >     return getInteraction().participations[0]
>
> It is, of course, better if you can structure your app so you don't have
> to pull the request "out of thin air", but if you do, I'd be a little
> more careful about it.  Like so:
>
> def getRequest():
>      i = zope.security.management.getInteraction() # raises
> NoInteraction
>      for p in i.participations:
>          if IRequest.providedBy(p):
>              return p
>      raise RuntimeError('Could not find current request.')

Ah, thanks a lot for this, it works.

In my RDB/SQLAlchemy-based application, when a user logs in, his 
database-userID is stored into the session. In some forms, I have choices 
which are filled with user-related data (e.g. his email addresses). To 
retrieve this data from the relational database, I need the ID from the 
session.

I'd prefer if the vocabulary had direct access to the request, but it seems 
that vocabularies are bound to the content object and not to the view, 
whereas the request is only available in the view.

One solution could be to build a view-bound vocabulary, but that's probably 
hard to do and may break other things.  So this seems like a structural 
problem that is not easy to solve.

Best Regards,
Hermann

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