Fixed #25519 -- Made the admin "View site" link point to sites running on a subpath.

Used request.META['SCRIPT_NAME'] as the site_url if it hasn't been
customized from the default value of '/'.

django/contrib/admin/sites.py

@@ -306,11 +306,16 @@ class AdminSite(object):
         """
         Returns a dictionary of variables to put in the template context for
         *every* page in the admin site.
+
+        For sites running on a subpath, use the SCRIPT_NAME value if site_url
+        hasn't been customized.
         """
+        script_name = request.META['SCRIPT_NAME']
+        site_url = script_name if self.site_url == '/' and script_name else self.site_url
         return {
             'site_title': self.site_title,
             'site_header': self.site_header,
-            'site_url': self.site_url,
+            'site_url': site_url,
             'has_permission': self.has_permission(request),
             'available_apps': self.get_app_list(request),
         }

docs/ref/contrib/admin/index.txt

@@ -2513,6 +2513,15 @@ Templates can override or extend base admin templates as described in
     The URL for the "View site" link at the top of each admin page. By default,
     ``site_url`` is ``/``. Set it to ``None`` to remove the link.
 
+    For sites running on a subpath, the :meth:`each_context` method checks if
+    the current request has ``request.META['SCRIPT_NAME']`` set and uses that
+    value if ``site_url`` isn't set to something other than ``/``.
+
+    .. versionchanged:: 1.10
+
+        The ``SCRIPT_NAME`` support described in the previous paragraph was
+        added.
+
 .. attribute:: AdminSite.index_title
 
     The text to put at the top of the admin index page (a string). By default,

docs/releases/1.10.txt

@@ -32,7 +32,9 @@ Minor features
 :mod:`django.contrib.admin`
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-* ...
+* For sites running on a subpath, the default :attr:`URL for the "View site"
+  link <django.contrib.admin.AdminSite.site_url>` at the top of each admin page
+  will now point to ``request.META['SCRIPT_NAME']`` if set, instead of ``/``.
 
 :mod:`django.contrib.admindocs`
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/admin_views/test_adminsite.py

@@ -51,6 +51,11 @@ class SiteEachContextTest(TestCase):
         self.assertEqual(ctx['site_url'], '/')
         self.assertEqual(ctx['has_permission'], True)
 
+    def test_each_context_site_url_with_script_name(self):
+        request = RequestFactory().get(reverse('test_adminsite:index'), SCRIPT_NAME='/my-script-name/')
+        request.user = self.u1
+        self.assertEqual(site.each_context(request)['site_url'], '/my-script-name/')
+
     def test_available_apps(self):
         ctx = self.ctx
         apps = ctx['available_apps']