Question

I’m trying to get a django project set up, and I seem to be having trouble with my urlconf. I’m not sure what the deal is, and the error below isn’t entirely helpful to me. I don’t think it really has anything to do with template rendering, actually, because I stepped through the execution path until just before the render_to_response function completes (which is where the urlconf seems to be causing an error) and the template objects are parsed correctly.

Traceback (most recent call last):
  File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2978, in _HandleRequest
    base_env_dict=env_dict)
  File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 411, in Dispatch
    base_env_dict=base_env_dict)
  File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2244, in Dispatch
    self._module_dict)
  File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2162, in ExecuteCGI
    reset_modules = exec_script(handler_path, cgi_path, hook)
  File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2058, in ExecuteOrImportScript
    exec module_code in script_module.__dict__
  File "C:\Users\Ben\Development\workspace\ringbot\src\main.py", line 52, in <module>
    main()
  File "C:\Users\Ben\Development\workspace\ringbot\src\main.py", line 49, in main
    util.run_wsgi_app(application)
  File "C:\Program Files\Google\google_appengine\google\appengine\ext\webapp\util.py", line 97, in run_wsgi_app
    run_bare_wsgi_app(add_wsgi_middleware(application))
  File "C:\Program Files\Google\google_appengine\google\appengine\ext\webapp\util.py", line 115, in run_bare_wsgi_app
    result = application(env, _start_response)
  File "C:\Python25\lib\site-packages\django\core\handlers\wsgi.py", line 241, in __call__
    response = self.get_response(request)
  File "C:\Python25\lib\site-packages\django\core\handlers\base.py", line 134, in get_response
    return self.handle_uncaught_exception(request, resolver, exc_info)
  File "C:\Python25\lib\site-packages\django\core\handlers\base.py", line 154, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "C:\Python25\lib\site-packages\django\views\debug.py", line 40, in technical_500_response
    html = reporter.get_traceback_html()
  File "C:\Python25\lib\site-packages\django\views\debug.py", line 114, in get_traceback_html
    return t.render(c)
  File "C:\Python25\lib\site-packages\django\template\__init__.py", line 178, in render
    return self.nodelist.render(context)
  File "C:\Python25\lib\site-packages\django\template\__init__.py", line 779, in render
    bits.append(self.render_node(node, context))
  File "C:\Python25\lib\site-packages\django\template\debug.py", line 81, in render_node
    raise wrapped
TemplateSyntaxError: <unprintable TemplateSyntaxError object>

Here is my top-level urlconf:

from django.conf.urls.defaults import *

urlpatterns = patterns('',
   (r'', include('pub.urls')),
)

And pub.urls:

from django.conf.urls.defaults import *
import pub

urlpatterns = patterns('pub.views',
    (r'^$', 'index')
)

and pub.views.index:

# Create your views here.
from django.shortcuts import render_to_response
from django.http import HttpResponse
import openidgae

# this needs to be moved somewhere else, but for now it can live here
def index(request):
    lip = openidgae.get_current_person(request, HttpResponse())
    resp = render_to_response('pub/index.html', {'lip': lip}) # exception thrown here
    return resp

Answer 1

looks like the problem is because of a NoReverseMatch exception being thrown because my templates contain a {% url … %} block that doesn’t resolve. From the django site: Note that if the URL you’re reversing doesn’t exist, you’ll get an NoReverseMatch exception raised, which will cause your site to display an error page.