import of handler500 is missing in django/contrib/auth/tests/urls.py

[Marco De Paoli]

as documented here ​http://code.djangoproject.com/ticket/11013#comment:1

all urls files must contain

from django.conf.urls.defaults import *

or an explicit import for the function handler404 and handler500 ex.

from django.conf.urls.defaults import handler404, handler500

but the file django/contrib/auth/tests/urls.py doesn't follow this rule

the consequence is that any problem that arise inside auth tests is signaled as

AttributeError: 'module' object has no attribute 'handler500'

as a temporary workaround I used this method:

• modify django/contrib/auth/tests/urls.py to add an explict import for handler500
• run auth test cases and obtain the correct error message
• restore django/contrib/auth/tests/urls.py

Nevertheless this case shows another problem

When Django outputs:

AttributeError: 'module' object has no attribute 'handler500'

it doesn't signal which file is missing handler500, and this makes the research a little bit hard

My advice is to modify slightly the urlresolver mechanism (django/core/urlresolvers.py)

for example the instruction

callback = getattr(self.urlconf_module, 'handler%s' % view_type)

could be enveloped inside a try/except block that rises an exception with self.urlconf_module string in it

[Carl Meyer]

In [15566]:

[1.2.X] Fixed #15343 -- Added import of handler500 and handler404 in URLconf for contrib.auth tests, so that other configuration errors that cause test failures aren't masked by 'missing handler500' errors.

[Carl Meyer]

No fix is needed in trunk, because in trunk URLconfs are no longer required to import handler500 and handler404.