Re: (yet another) Custom templatetag raising KeyError when DEBUG=False

Collin, I got the bug!

I was in the wrong path, it had nothing to do with request or all the
other things I mentioned; translation config problems were the
culprit. Your explanation was very helpful to put me on the right
trace!

Thank you so much!!!

- Alexandre

On Fri, Dec 26, 2014 at 7:23 PM, Collin Anderson <cmawebsite@gmail.com> wrote:
> Hi,
>
> I see what's going on. This is your 500.html server error template that's
> being rendered, and unfortunately, you don't get context processors in that
> template. Sorry. The idea is to handle cases where even one of your
> middleware or context processors is failing.
>
> See the line:
> return http.HttpResponseServerError(template.render(Context({})))
>
> I think your best option is just to handle not having the request object
> available.
>
> To be clear, there must be some _other_ error that's happening that's
> causing the 500 in the first place. If you configure ADMINS, you'll get an
> email with the traceback.
>
> Collin
>
> On Tuesday, December 23, 2014 6:04:35 AM UTC-6, Alexandre Provencio wrote:
>>
>> Hi Collin, thanks for answering.
>>
>> Yes this is the home view, but just to clarify, almost all of the
>> views of the project follow this pattern of a function that returns
>> the render shortcut. The templates of the views also follow the a
>> pattern in the sense they all extend from base.html, which is where
>> the calls for the templatetag are done. This is the full traceback:
>>
>> 0 errors found
>> December 23, 2014 - 09:53:07
>> Django version 1.6.2, using settings 'foo.settings'
>> Starting development server at http://127.0.0.1:8000/
>> Quit the server with CONTROL-C.
>> Traceback (most recent call last):
>> File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
>> self.result = application(self.environ, self.start_response)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py",
>> line 206, in __call__
>> response = self.get_response(request)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/base.py",
>> line 155, in get_response
>> response = self.handle_uncaught_exception(request, resolver,
>> sys.exc_info())
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/base.py",
>> line 238, in handle_uncaught_exception
>> return callback(request, **param_dict)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/utils/decorators.py",
>> line 99, in _wrapped_view
>> response = view_func(request, *args, **kwargs)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/views/defaults.py",
>> line 46, in server_error
>> return http.HttpResponseServerError(template.render(Context({})))
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 140, in render
>> return self._render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 134, in _render
>> return self.nodelist.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 840, in render
>> bit = self.render_node(node, context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/debug.py",
>> line 78, in render_node
>> return node.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/loader_tags.py",
>> line 123, in render
>> return compiled_parent._render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 134, in _render
>> return self.nodelist.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 840, in render
>> bit = self.render_node(node, context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/debug.py",
>> line 78, in render_node
>> return node.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/defaulttags.py",
>> line 196, in render
>> nodelist.append(node.render(context))
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 1125, in render
>> return func(*resolved_args, **resolved_kwargs)
>> File
>> "/home/xand/Documentos/src/Projetos/django-foo/app/templatetags/helper_tags.py",
>> line 14, in change_lang
>> path = context['request'].path
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/context.py",
>> line 56, in __getitem__
>> raise KeyError(key)
>> KeyError: 'request'
>> [23/Dec/2014 09:53:18] "GET /en/home HTTP/1.1" 500 59
>> Traceback (most recent call last):
>> File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
>> self.result = application(self.environ, self.start_response)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py",
>> line 206, in __call__
>> response = self.get_response(request)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/base.py",
>> line 155, in get_response
>> response = self.handle_uncaught_exception(request, resolver,
>> sys.exc_info())
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/base.py",
>> line 238, in handle_uncaught_exception
>> return callback(request, **param_dict)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/utils/decorators.py",
>> line 99, in _wrapped_view
>> response = view_func(request, *args, **kwargs)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/views/defaults.py",
>> line 46, in server_error
>> return http.HttpResponseServerError(template.render(Context({})))
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 140, in render
>> return self._render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 134, in _render
>> return self.nodelist.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 840, in render
>> bit = self.render_node(node, context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/debug.py",
>> line 78, in render_node
>> return node.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/loader_tags.py",
>> line 123, in render
>> return compiled_parent._render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 134, in _render
>> return self.nodelist.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 840, in render
>> bit = self.render_node(node, context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/debug.py",
>> line 78, in render_node
>> return node.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/defaulttags.py",
>> line 196, in render
>> nodelist.append(node.render(context))
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 1125, in render
>> return func(*resolved_args, **resolved_kwargs)
>> File
>> "/home/xand/Documentos/src/Projetos/django-foo/app/templatetags/helper_tags.py",
>> line 14, in change_lang
>> path = context['request'].path
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/context.py",
>> line 56, in __getitem__
>> raise KeyError(key)
>> KeyError: 'request'
>> Traceback (most recent call last):
>> File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
>> self.result = application(self.environ, self.start_response)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py",
>> line 206, in __call__
>> response = self.get_response(request)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/base.py",
>> line 155, in get_response
>> response = self.handle_uncaught_exception(request, resolver,
>> sys.exc_info())
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/core/handlers/base.py",
>> line 238, in handle_uncaught_exception
>> return callback(request, **param_dict)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/utils/decorators.py",
>> line 99, in _wrapped_view
>> response = view_func(request, *args, **kwargs)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/views/defaults.py",
>> line 46, in server_error
>> return http.HttpResponseServerError(template.render(Context({})))
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 140, in render
>> return self._render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 134, in _render
>> return self.nodelist.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 840, in render
>> bit = self.render_node(node, context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/debug.py",
>> line 78, in render_node
>> return node.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/loader_tags.py",
>> line 123, in render
>> return compiled_parent._render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 134, in _render
>> return self.nodelist.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 840, in render
>> bit = self.render_node(node, context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/debug.py",
>> line 78, in render_node
>> return node.render(context)
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/defaulttags.py",
>> line 196, in render
>> nodelist.append(node.render(context))
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/base.py",
>> line 1125, in render
>> return func(*resolved_args, **resolved_kwargs)
>> File
>> "/home/xand/Documentos/src/Projetos/django-foo/app/templatetags/helper_tags.py",
>> line 14, in change_lang
>> path = context['request'].path
>> File
>> "/home/xand/.virtualenvs/django-foo/local/lib/python2.7/site-packages/django/template/context.py",
>> line 56, in __getitem__
>> raise KeyError(key)
>> KeyError: 'request'
>>
>>
>> On Tue, Dec 23, 2014 at 12:03 AM, Collin Anderson <cmawe...@gmail.com>
>> wrote:
>> > Hi,
>> >
>> > Do you have more of your traceback?
>> >
>> > Are you sure this is your "home" view that's being called?
>> >
>> > Is this happening in an included template?
>> >
>> > Collin
>> >
>> >
>> > On Saturday, December 20, 2014 3:27:00 PM UTC-6, Alexandre Provencio
>> > wrote:
>> >>
>> >> Hello all, this is a cross post i made on stackoverflow
>> >>
>> >>
>> >> http://stackoverflow.com/questions/27503581/yet-another-custom-templatetag-raising-keyerror-when-debug-false
>> >>
>> >> I'm trying to use a custom templatetag (this one actually:
>> >> https://djangosnippets.org/snippets/2875/), on my project which works
>> >> fine as long as DEBUG=True. When it's False, the relevant error part
>> >> is:
>> >>
>> >> File "...app/templatetags/helper_tags.py", line 15, in change_lang
>> >> path = context['request'].path
>> >> File "...local/lib/python2.7/site-packages/django/template/context.py",
>> >> line 56, in __getitem__
>> >> raise KeyError(key)
>> >> KeyError: 'request'
>> >>
>> >> I've seen a lot of questions like this and I have already done the
>> >> settings that all of them seen to suggest which are:
>> >>
>> >> 1) views.py uses django.shortcuts.render:
>> >>
>> >> from django.shortcuts import render
>> >> def home(request):
>> >> return render(request, 'home.html')
>> >>
>> >> 2) settings.py contains:
>> >>
>> >> ALLOWED_HOSTS = ['*']
>> >>
>> >> from django.conf import global_settings
>> >> TEMPLATE_CONTEXT_PROCESSORS =
>> >> global_settings.TEMPLATE_CONTEXT_PROCESSORS
>> >> + (
>> >> "django.core.context_processors.request",
>> >> )
>> >>
>> >> I've also created a new project with the same Django version (1.6.2)
>> >> that tries to imitate the problematic project as much as possible, and
>> >> for my despair it works fine also when DEBUG=False.
>> >>
>> >> Any hints on this is very much appreciated.
>> >>
>> >> Cheers!
>> >
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