Fixed #23993 -- Added form.media to the admin login template.

django/contrib/admin/templates/admin/login.html

@@ -1,7 +1,9 @@
 {% extends "admin/base_site.html" %}
 {% load i18n admin_static %}
 
-{% block extrastyle %}{{ block.super }}<link rel="stylesheet" type="text/css" href="{% static "admin/css/login.css" %}" />{% endblock %}
+{% block extrastyle %}{{ block.super }}<link rel="stylesheet" type="text/css" href="{% static "admin/css/login.css" %}" />
+{{ form.media }}
+{% endblock %}
 
 {% block bodyclass %}{{ block.super }} login{% endblock %}
 

tests/admin_views/forms.py

@@ -4,6 +4,9 @@ from django.contrib.admin.forms import AdminAuthenticationForm
 
 class CustomAdminAuthenticationForm(AdminAuthenticationForm):
 
+    class Media:
+        css = {'all': ('path/to/media.css',)}
+
     def clean_username(self):
         username = self.cleaned_data.get('username')
         if username == 'customform':

tests/admin_views/tests.py

@@ -1182,6 +1182,7 @@ class CustomModelAdminTest(AdminViewBasicTestCase):
         self.assertIsInstance(login, TemplateResponse)
         self.assertEqual(login.status_code, 200)
         self.assertContains(login, 'custom form error')
+        self.assertContains(login, 'path/to/media.css')
 
     def test_custom_admin_site_login_template(self):
         self.client.logout()