As it turns out, view_func is not always available

as a request attribute. This is especially true
for 'fallback' type of views that are rendered
from within middleware, such as the one used
in Django's own flatpages.

Author: dokterbob

debug_toolbar/panels/request_vars.py

@@ -32,10 +32,14 @@ def content(self):
             'get': [(k, self.request.GET.getlist(k)) for k in self.request.GET],
             'post': [(k, self.request.POST.getlist(k)) for k in self.request.POST],
             'cookies': [(k, self.request.COOKIES.get(k)) for k in self.request.COOKIES],
-            'view_func': '%s.%s' % (self.view_func.__module__, self.view_func.__name__),
-            'view_args': self.view_args,
-            'view_kwargs': self.view_kwargs
         })
+        if hasattr(self, 'view_func'):
+            context.update({
+                'view_func': '%s.%s' % (self.view_func.__module__, self.view_func.__name__),
+                'view_args': self.view_args,
+                'view_kwargs': self.view_kwargs
+            })
+
         if hasattr(self.request, 'session'):
             context.update({
                 'session': [(k, self.request.session.get(k)) for k in self.request.session.iterkeys()]