id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
24829	TemplateView raises unhandled ContentNotRenderedError error when used as error handler	Udi Oron	Ana Balica	"When using TemplateView for handler403, an unhandled error occurs:


{{{
from django.conf.urls import url
from django.core.exceptions import PermissionDenied
from django.views.generic import TemplateView


class PermissionDeniedView(TemplateView):
    template_name = '403.html'


handler403 = PermissionDeniedView.as_view()


def my_view(request):
    raise PermissionDenied


urlpatterns = [
    url(r'^$', my_view),
]
}}}

Traceback:


{{{
Traceback (most recent call last):
  File ""/usr/lib64/python2.7/wsgiref/handlers.py"", line 86, in run
    self.finish_response()
  File ""/usr/lib64/python2.7/wsgiref/handlers.py"", line 127, in finish_response
    for data in self.result:
  File ""/home/foo/.virtualenvs/bar/lib/python2.7/site-packages/django/template/response.py"", line 171, in __iter__
    raise ContentNotRenderedError('The response content must be '
ContentNotRenderedError: The response content must be rendered before it can be iterated over.
[20/May/2015 07:26:25]""GET / HTTP/1.1"" 500 59
Traceback (most recent call last):
  File ""/usr/lib64/python2.7/SocketServer.py"", line 599, in process_request_thread
    self.finish_request(request, client_address)
  File ""/usr/lib64/python2.7/SocketServer.py"", line 334, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File ""/home/foo/.virtualenvs/bar/lib/python2.7/site-packages/django/core/servers/basehttp.py"", line 102, in __init__
    super(WSGIRequestHandler, self).__init__(*args, **kwargs)
  File ""/usr/lib64/python2.7/SocketServer.py"", line 655, in __init__
    self.handle()
  File ""/home/foo/.virtualenvs/bar/lib/python2.7/site-packages/django/core/servers/basehttp.py"", line 182, in handle
    handler.run(self.server.get_app())
  File ""/usr/lib64/python2.7/wsgiref/handlers.py"", line 92, in run
    self.close()
  File ""/usr/lib64/python2.7/wsgiref/simple_server.py"", line 33, in close
    self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
}}}

One workaround is to force TemplateResponse to render itself:


{{{
class PermissionDeniedView(TemplateView):
    template_name = '403.html'

    def dispatch(self, request, *args, **kwargs):
        response = super(PermissionDeniedView, self).dispatch(request, *args, **kwargs)
        response.render()
        return response
}}}


"	New feature	closed	Generic views	dev	Normal	fixed			Ready for checkin	1	0	0	0	0	0