Fixed #21619 -- Made SingleObjectMixin.get_object catch a more precise exception.

Thanks to Keryn Knight for the report.

django/views/generic/detail.py

@@ -1,6 +1,6 @@
 from __future__ import unicode_literals
 
-from django.core.exceptions import ImproperlyConfigured, ObjectDoesNotExist
+from django.core.exceptions import ImproperlyConfigured
 from django.db import models
 from django.http import Http404
 from django.utils.translation import ugettext as _
@@ -50,7 +50,7 @@ class SingleObjectMixin(ContextMixin):
         try:
             # Get the single item from the filtered queryset
             obj = queryset.get()
-        except ObjectDoesNotExist:
+        except queryset.model.DoesNotExist:
             raise Http404(_("No %(verbose_name)s found matching the query") %
                           {'verbose_name': queryset.model._meta.verbose_name})
         return obj

tests/generic_views/models.py

@@ -1,5 +1,7 @@
 from django.core.urlresolvers import reverse
 from django.db import models
+from django.db.models import QuerySet
+from django.db.models.manager import BaseManager
 from django.utils.encoding import python_2_unicode_compatible
 
 
@@ -31,6 +33,13 @@ class Author(models.Model):
         return self.name
 
 
+class DoesNotExistQuerySet(QuerySet):
+    def get(self, *args, **kwargs):
+        raise Author.DoesNotExist
+
+DoesNotExistBookManager = BaseManager.from_queryset(DoesNotExistQuerySet)
+
+
 @python_2_unicode_compatible
 class Book(models.Model):
     name = models.CharField(max_length=300)
@@ -39,6 +48,9 @@ class Book(models.Model):
     authors = models.ManyToManyField(Author)
     pubdate = models.DateField()
 
+    objects = models.Manager()
+    does_not_exist = DoesNotExistBookManager()
+
     class Meta:
         ordering = ['-pubdate']
 

tests/generic_views/test_detail.py

@@ -1,6 +1,6 @@
 from __future__ import unicode_literals
 
-from django.core.exceptions import ImproperlyConfigured
+from django.core.exceptions import ImproperlyConfigured, ObjectDoesNotExist
 from django.test import TestCase
 from django.views.generic.base import View
 
@@ -25,6 +25,13 @@ class DetailViewTest(TestCase):
         self.assertEqual(res.context['author'], Author.objects.get(pk=1))
         self.assertTemplateUsed(res, 'generic_views/author_detail.html')
 
+    def test_detail_missing_object(self):
+        res = self.client.get('/detail/author/500/')
+        self.assertEqual(res.status_code, 404)
+
+    def test_detail_object_does_not_exist(self):
+        self.assertRaises(ObjectDoesNotExist, self.client.get, '/detail/doesnotexist/1/')
+
     def test_detail_by_custom_pk(self):
         res = self.client.get('/detail/author/bycustompk/1/')
         self.assertEqual(res.status_code, 200)

tests/generic_views/urls.py

@@ -55,7 +55,8 @@ urlpatterns = patterns('',
         views.AuthorDetail.as_view(queryset=None)),
     (r'^detail/nonmodel/1/$',
         views.NonModelDetail.as_view()),
-
+    (r'^detail/doesnotexist/(?P<pk>\d+)/$',
+        views.ObjectDoesNotExistDetail.as_view()),
     # FormView
     (r'^contact/$',
         views.ContactView.as_view()),

tests/generic_views/views.py

@@ -300,3 +300,8 @@ class NonModelDetail(generic.DetailView):
 
     def get_object(self, queryset=None):
         return NonModel()
+
+
+class ObjectDoesNotExistDetail(generic.DetailView):
+    def get_queryset(self):
+        return Book.does_not_exist.all()