Isn't there an "app_path" or something in TG (used by tg.url() function)
that could accomplish something similar?
Or am I misunderstanding what the goal is?
Kevin Horn
On 2/20/07, wavydavy <[EMAIL PROTECTED]> wrote:
>
>
> On Feb 20, 11:06 pm, Matthew Bevan <[EMAIL PROTECTED]> wrote:
> [snip]
> > Investigate the cherrypy._cputil.get_object_trail() function.
> > It took me quite awhile to figure out how it works, as the few
> > examples I've seen online are pretty obfuscated.
>
> I agree it is a little obfuscated.
>
> However, this gives you the current object trail, for the url path you
> are currently on. If you wanted an arbitrary instance of a specific
> class, AFAIK, you need to search the root tree yourself.
>
> I wrote something along those lines myself today. I wanted to build an
> automatic menu from all the connected objects/methods on a cherrypy
> tree, and a widget to display it. I parsed the cherrypy object tree at
> start-up and collected the names of classes/methods to use for
> displaying the widget. Below is an untested attempt to use the same
> approach to searching the cherrypy tree, but to achieve the original
> posters goal.
>
> from inspect import getmembers
>
> def parse_instance_dict(obj, path=[]):
> instances = { obj.__class__ : path }
> for name, value in getmembers(obj):
> if isinstance(value, controllers.Controller):
> instances.update(**parse_instance_dict(value, path +
> [name]))
> return instances
>
> To use:
>
> instance_of = dict()
>
> class Root(controllers.RootController):
> def __init__(self):
> global instance_of
> instance_of = parse_instance_dict(self) # can only parse the
> tree once its been created!
>
> class MyController(controllers.Controller):
> ....
>
> class MyOtherController(controllers.Controller):
>
> def some_method(self, *args, **kwds):
> ....
> if some_condition:
> redirect(instance_of[MyController])
>
>
> This will build a lookup table based on class name, which would work
> as long as you don't have two instances of the same class :) You could
> add an id attribute or similar to the controller instances simply
> enough, and use that as your lookup key, which would be more robust.
> This way you can move your tree around at will and this will
> automatically pickup the changes. Not sure if this is the best way to
> parse a cherrypy tree, but this approach is working nicely for me with
> my auto-menu widget.
>
> HTH
>
> --
> wavy davy
>
>
> >
>
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