Author: russellm
Date: 2010-08-14 09:27:35 -0500 (Sat, 14 Aug 2010)
New Revision: 13590

Modified:
   django/trunk/django/core/urlresolvers.py
   django/trunk/tests/regressiontests/urlpatterns_reverse/tests.py
   django/trunk/tests/regressiontests/urlpatterns_reverse/views.py
Log:
Fixed #5350 -- Added fallback to default 404/500 handlers when they're not 
explicitly specified (or imported) in a urls.py file. Thanks to Thomas 
G?\195?\188ttler for the report and initial patch.

Modified: django/trunk/django/core/urlresolvers.py
===================================================================
--- django/trunk/django/core/urlresolvers.py    2010-08-14 13:43:13 UTC (rev 
13589)
+++ django/trunk/django/core/urlresolvers.py    2010-08-14 14:27:35 UTC (rev 
13590)
@@ -284,7 +284,12 @@
     url_patterns = property(_get_url_patterns)
 
     def _resolve_special(self, view_type):
-        callback = getattr(self.urlconf_module, 'handler%s' % view_type)
+        callback = getattr(self.urlconf_module, 'handler%s' % view_type, None)
+        if not callback:
+            # No handler specified in file; use default
+            # Lazy import, since urls.defaults imports this file
+            from django.conf.urls import defaults
+            callback = getattr(defaults, 'handler%s' % view_type)
         try:
             return get_callable(callback), {}
         except (ImportError, AttributeError), e:

Modified: django/trunk/tests/regressiontests/urlpatterns_reverse/tests.py
===================================================================
--- django/trunk/tests/regressiontests/urlpatterns_reverse/tests.py     
2010-08-14 13:43:13 UTC (rev 13589)
+++ django/trunk/tests/regressiontests/urlpatterns_reverse/tests.py     
2010-08-14 14:27:35 UTC (rev 13590)
@@ -356,6 +356,22 @@
         self.assertEqual(self.callable_resolver.resolve404(), handler)
         self.assertEqual(self.callable_resolver.resolve500(), handler)
 
+class DefaultErrorHandlerTests(TestCase):
+    urls = 'regressiontests.urlpatterns_reverse.urls_without_full_import'
+
+    def test_default_handler(self):
+        "If the urls.py doesn't specify handlers, the defaults are used"
+        try:
+            response = self.client.get('/test/')
+            self.assertEquals(response.status_code, 404)
+        except AttributeError:
+            self.fail("Shouldn't get an AttributeError due to undefined 404 
handler")
+
+        try:
+            self.assertRaises(ValueError, self.client.get, '/bad_view/')
+        except AttributeError:
+            self.fail("Shouldn't get an AttributeError due to undefined 500 
handler")
+
 class NoRootUrlConfTests(TestCase):
     """Tests for handler404 and handler500 if urlconf is None"""
     urls = None

Modified: django/trunk/tests/regressiontests/urlpatterns_reverse/views.py
===================================================================
--- django/trunk/tests/regressiontests/urlpatterns_reverse/views.py     
2010-08-14 13:43:13 UTC (rev 13589)
+++ django/trunk/tests/regressiontests/urlpatterns_reverse/views.py     
2010-08-14 14:27:35 UTC (rev 13590)
@@ -1,14 +1,19 @@
+from django.http import HttpResponse
+
 def empty_view(request, *args, **kwargs):
-    pass
+    return HttpResponse('')
 
 def kwargs_view(request, arg1=1, arg2=2):
-    pass
+    return HttpResponse('')
 
 def absolute_kwargs_view(request, arg1=1, arg2=2):
-    pass
+    return HttpResponse('')
 
 class ViewClass(object):
     def __call__(self, request, *args, **kwargs):
-        pass
+        return HttpResponse('')
 
 view_class_instance = ViewClass()
+
+def bad_view(request, *args, **kwargs):
+    raise ValueError("I don't think I'm getting good value for this view")

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