[mod_python] How to do multi-level dispatch with Vampire

On 5/3/07, Graham Dumpleton <graham.dumpleton at gmail.com> wrote:
> On 04/05/07, Jeff Hinrichs - DM&T <jeffh at dundeemt.com> wrote:
> > with mod_python + vampire what is the proper way to dispatch something like:
> >  /jobs/view/7
> >
> > I'm thinking of this idiom since it is common in some other frameworks,
> >
> > def _jobs_view(req,path):
> >     return 'using _jobs_view'
> >
> > def _jobs(req, path):
> >     d = path.split('/')
> >     if d[1] = 'view':
> >         return _jobs_view(req, path)
> >     else:
> >         return 'unknown action'
> >
> > job = vampire.PathInfo(_jobs)
> >
> >
> > I'm trying to make a RESTful api, i.e. /jobs/view/N, /jobs/edit/N, etc
>
> From memory and thus untested, but best to use an object instance to
> create the URL hierarchy for the 'job/view' component of path, then
> use PathInfo wrapper.
>
>   def _view(req, path):
>     return path
>
>   def Node: pass
>
>   job = Node()
>   job.view = vampire.PathInfo(_view)
>
> or being more explicit by creating a class for the actual concept.
>
>   class Job:
>     def _view(self, req, path):
>       return path
>     view = vampire.PathInfo(_view)
>
>   job = Job()
>
> If using version of Python with decorators, sure you could come up
> with a decorator which allowed you to say:
>
>   class Job:
>     @pass_path_as_argument
>     def view(self, req, path):
>       return path
>
> Graham
>

Graham,
That was exactly the nudge I was looking to get.  A little trial and
error + some googling resulted in:

class Foo:

    def __init__(self):

        self.bar = vampire.PathInfo(self._bar)

        self.baz = vampire.PathInfo(self._baz)

    def _bar(self,req,path):

        return "foo/bar:%s" % path

    def _baz(self,req,path):

        return "foo/baz:%s" % path



foo = Foo()

I'm looking for some decorator magic now.  I'll post back if/when I
find the right voodoo - I'm new to making my own decorators so they
look like magic to me still.<g>

Thanks for the nudge.

-jeff