Re: KeyError on validation failure after upgrading formencode

Hi Ian

Thanks for the AuthKit suggestion.

I repeated the test (submitting the form with all fields empty, which fails
validation) with the AuthKit decorator commented out on both the form
display and submission methods, and got the same end result (KeyError on
trying to use a parameter from request.params in the form display method,
after validation failure).  The stack trace looks the same (but of course
shorter), and at a quick glance the WSGI variables (on the Pylons error
debug page) look about the same, particularly the webob._parsed_post_vars
variable.

Any suggestions about what I should try next?  Would more/different
information about my environment or code help?  Also, am I asking the
question on the correct list?

Anyway, thanks again for your assistance.
John

2009/3/13 Ian Bicking <[email protected]>

> I'm wonder if perhaps this is an AuthKit/WebOb conflict.  It might be
> that AuthKit is reading in the parameters of POST requests in such a
> way that WebOb can't see them.  You could test by creating a POST form
> with a simple controller, and seeing if the POST variables get
> swallowed.  It isn't necessarily AuthKit that is swallowing them, but
> it seems like a good chance (disabling AuthKit and testing would make
> it clear).
>
> On Tue, Mar 10, 2009 at 6:32 AM, John Dickson <[email protected]> wrote:
> > Hi folks
> >
> > I've recently run into lots of problems with validation in an app of
> mine,
> > after upgrading to formencode 1.2.x.  This is a Pylons-based app (I've
> also
> > just upgraded Pylons from 0.9.6 to 0.9.7), which has been working fine
> for a
> > number of people until these upgrades.  I've been beating my head against
> a
> > brick wall trying to diagnose this for a couple of days now, and still
> > haven't got anywhere, so I'd be *really* grateful for any pointers you
> could
> > give.
> >
> > I have to say, though, that I'm pretty much a newbie on formencode.  I'm
> > also also only guessing that this is a formencode issue, but it may well
> be
> > Pylons.
> >
> > My controllers use the Pylons @validate decorator.  Everything is fine if
> > there are no errors detected by the decorator (using a subclass of
> Schema),
> > but if any validation failure occurs I get a KeyError when trying to run
> the
> > controller method to redisplay the form.  Examining the request, I see
> that
> > params, GET and POST are all empty (UnicodeMultiDict objects), while the
> > WSGI webob._parsed_post_vars variable seems to have all my POST fields in
> it
> > (exactly what I'd have expected to see in params).
> >
> > I'm including a stack trace below, in case that's of any assistance.
> Thanks
> > in advance for your help.
> >
> > Cheers .................................... John Dickson
> >
> > Traceback (most recent call last):
> >   File "/home/johnd/python/jcr-0.6.7/jcr/lib/base.py", line 98, in
> __call__
> >     return WSGIController.__call__(self, environ, start_response)
> >   File
> >
> "/usr/lib/python2.5/site-packages/Pylons-0.9.7-py2.5.egg/pylons/controllers/core.py",
> > line 221, in __call__
> >     response = self._dispatch_call()
> >   File
> >
> "/usr/lib/python2.5/site-packages/Pylons-0.9.7-py2.5.egg/pylons/controllers/core.py",
> > line 172, in _dispatch_call
> >     response = self._inspect_call(func)
> >   File
> >
> "/usr/lib/python2.5/site-packages/Pylons-0.9.7-py2.5.egg/pylons/controllers/core.py",
> > line 107, in _inspect_call
> >     result = self._perform_call(func, args)
> >   File
> >
> "/usr/lib/python2.5/site-packages/Pylons-0.9.7-py2.5.egg/pylons/controllers/core.py",
> > line 60, in _perform_call
> >     return func(**args)
> >   File "<string>", line 2, in upload
> >   File
> >
> "/usr/lib/python2.5/site-packages/AuthKit-0.4.3-py2.5.egg/authkit/authorize/pylons_adaptors.py",
> > line 36, in validate
> >     return permission.check(app, request.environ, self.start_response)
> >   File
> >
> "/usr/lib/python2.5/site-packages/AuthKit-0.4.3-py2.5.egg/authkit/permissions.py",
> > line 177, in check
> >     return app(environ, start_response)
> >   File
> >
> "/usr/lib/python2.5/site-packages/AuthKit-0.4.3-py2.5.egg/authkit/authorize/pylons_adaptors.py",
> > line 35, in app
> >     return func(self, *args, **kwargs)
> >   File "<string>", line 2, in upload
> >   File
> >
> "/usr/lib/python2.5/site-packages/Pylons-0.9.7-py2.5.egg/pylons/decorators/__init__.py",
> > line 161, in wrapper
> >     response = self._dispatch_call()
> >   File
> >
> "/usr/lib/python2.5/site-packages/Pylons-0.9.7-py2.5.egg/pylons/controllers/core.py",
> > line 172, in _dispatch_call
> >     response = self._inspect_call(func)
> >   File
> >
> "/usr/lib/python2.5/site-packages/Pylons-0.9.7-py2.5.egg/pylons/controllers/core.py",
> > line 107, in _inspect_call
> >     result = self._perform_call(func, args)
> >   File
> >
> "/usr/lib/python2.5/site-packages/Pylons-0.9.7-py2.5.egg/pylons/controllers/core.py",
> > line 60, in _perform_call
> >     return func(**args)
> >   File "<string>", line 2, in index
> >   File
> >
> "/usr/lib/python2.5/site-packages/AuthKit-0.4.3-py2.5.egg/authkit/authorize/pylons_adaptors.py",
> > line 36, in validate
> >     return permission.check(app, request.environ, self.start_response)
> >   File
> >
> "/usr/lib/python2.5/site-packages/AuthKit-0.4.3-py2.5.egg/authkit/permissions.py",
> > line 177, in check
> >     return app(environ, start_response)
> >   File
> >
> "/usr/lib/python2.5/site-packages/AuthKit-0.4.3-py2.5.egg/authkit/authorize/pylons_adaptors.py",
> > line 35, in app
> >     return func(self, *args, **kwargs)
> >   File
> >
> "/home/johnd/python/jcr-0.6.7/jcr/controllers/projectadmin/selectfileset.py",
> > line 52, in index
> >     c.projectId = int(request.params['projectId'])
> >   File "build/bdist.linux-i686/egg/webob/multidict.py", line 314, in
> > __getitem__
> >     return
> self._decode_value(self.multi.__getitem__(self._encode_key(key)))
> >   File "build/bdist.linux-i686/egg/webob/multidict.py", line 440, in
> > __getitem__
> >     raise KeyError(key)
> > KeyError: 'projectId'
> >
> >
> >
> ------------------------------------------------------------------------------
> >
> > _______________________________________________
> > FormEncode-discuss mailing list
> > FormEncode-discuss-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> > https://lists.sourceforge.net/lists/listinfo/formencode-discuss
> >
> >
>
>
>
> --
> Ian Bicking  |  http://blog.ianbicking.org
>



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