Re: KeyError on validation failure after upgrading formencode

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'
>
>
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>
>



-- 
Ian Bicking  |  http://blog.ianbicking.org

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