Fixed #15122 -- Restored reporting of the template files tried in the texmplate…

Fixed #15122 -- Restored reporting of the template files tried in the texmplate loader post mortem section of the TemplateDoesNotExit 500 error debug page. Thanks rdrey for reporting this regression.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15252 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/views/debug.py

@@ -89,17 +89,18 @@ class ExceptionReporter:
             for loader in template_source_loaders:
                 try:
                     module = import_module(loader.__module__)
-                    source_list_func = module.get_template_sources
+                    if hasattr(loader, '__class__'):
+                        source_list_func = loader.get_template_sources
+                        loader_name = loader.__module__ + '.' + loader.__class__.__name__
+                    else: # NOTE: Remember to remove this branch when we deprecate old template loaders in 1.4
+                        source_list_func = module.get_template_sources
+                        loader_name = loader.__module__ + '.' + loader.__name__
                     # NOTE: This assumes exc_value is the name of the template that
                     # the loader attempted to load.
                     template_list = [{'name': t, 'exists': os.path.exists(t)} \
                         for t in source_list_func(str(self.exc_value))]
                 except (ImportError, AttributeError):
                     template_list = []
-                if hasattr(loader, '__class__'):
-                    loader_name = loader.__module__ + '.' + loader.__class__.__name__
-                else:
-                    loader_name = loader.__module__ + '.' + loader.__name__
                 self.loader_debug_info.append({
                     'loader': loader_name,
                     'templates': template_list,

tests/regressiontests/views/tests/debug.py

@@ -48,3 +48,7 @@ class DebugViewTests(TestCase):
                 self.assertFalse(raising_loc.find('raise BrokenException') == -1,
                     "Failed to find 'raise BrokenException' in last frame of traceback, instead found: %s" %
                         raising_loc)
+
+    def test_template_loader_postmortem(self):
+        response = self.client.get(reverse('raises_template_does_not_exist'))
+        self.assertContains(response, 'templates/i_dont_exist.html</code> (File does not exist)</li>', status_code=500)

tests/regressiontests/views/urls.py

@@ -143,6 +143,7 @@ urlpatterns += patterns('django.views.generic.simple',
 urlpatterns += patterns('regressiontests.views.views',
     url(r'view_exception/(?P<n>\d+)/$', 'view_exception', name='view_exception'),
     url(r'template_exception/(?P<n>\d+)/$', 'template_exception', name='template_exception'),
+    url(r'^raises_template_does_not_exist/$', 'raises_template_does_not_exist', name='raises_template_does_not_exist'),
 
     (r'^shortcuts/render_to_response/$', 'render_to_response_view'),
     (r'^shortcuts/render_to_response/request_context/$', 'render_to_response_view_with_request_context'),

tests/regressiontests/views/views.py

@@ -4,7 +4,7 @@ from django import forms
 from django.http import HttpResponse, HttpResponseRedirect
 from django.core.urlresolvers import get_resolver
 from django.shortcuts import render_to_response, render
-from django.template import Context, RequestContext
+from django.template import Context, RequestContext, TemplateDoesNotExist
 from django.views.debug import technical_500_response
 from django.views.generic.create_update import create_object
 
@@ -120,3 +120,11 @@ def render_view_with_current_app_conflict(request):
         'foo': 'FOO',
         'bar': 'BAR',
     }, current_app="foobar_app", context_instance=RequestContext(request))
+
+def raises_template_does_not_exist(request):
+    # We need to inspect the HTML generated by the fancy 500 debug view but
+    # the test client ignores it, so we send it explicitly.
+    try:
+        return render_to_response('i_dont_exist.html')
+    except TemplateDoesNotExist:
+        return technical_500_response(request, *sys.exc_info())