Made model instance history admin view link not hard-coded. Refs #15294.

django/contrib/admin/templates/admin/change_form.html

@@ -29,7 +29,7 @@
 {% if change %}{% if not is_popup %}
   <ul class="object-tools">
     {% block object-tools-items %}
-    <li><a href="history/" class="historylink">{% trans "History" %}</a></li>
+    <li><a href="{% url opts|admin_urlname:'history' original.pk %}" class="historylink">{% trans "History" %}</a></li>
     {% if has_absolute_url %}<li><a href="{% url 'admin:view_on_site' content_type_id original.pk %}" class="viewsitelink">{% trans "View on site" %}</a></li>{% endif%}
     {% endblock %}
   </ul>

tests/regressiontests/admin_custom_urls/fixtures/actions.json

@@ -40,5 +40,12 @@
     "fields": {
       "description": "An action with a name suspected of being a XSS attempt"
     }
+  },
+  {
+    "pk": "The name of an action", 
+    "model": "admin_custom_urls.action", 
+    "fields": {
+      "description": "A generic action"
+    }
   }
-]
+]

tests/regressiontests/admin_custom_urls/tests.py

@@ -10,6 +10,12 @@ from .models import Action
 
 @override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class AdminCustomUrlsTest(TestCase):
+    """
+    Remember that:
+    * The Action model has a CharField PK.
+    * The ModelAdmin for Action customizes the add_view URL, it's
+      '<app name>/<model name>/!add/'
+    """
     fixtures = ['users.json', 'actions.json']
 
     def setUp(self):
@@ -20,20 +26,24 @@ class AdminCustomUrlsTest(TestCase):
 
     def testBasicAddGet(self):
         """
-        A smoke test to ensure GET on the add_view works.
+        Ensure GET on the add_view works.
         """
         response = self.client.get('/custom_urls/admin/admin_custom_urls/action/!add/')
         self.assertIsInstance(response, TemplateResponse)
         self.assertEqual(response.status_code, 200)
 
     def testAddWithGETArgs(self):
+        """
+        Ensure GET on the add_view plus specifying a field value in the query
+        string works.
+        """
         response = self.client.get('/custom_urls/admin/admin_custom_urls/action/!add/', {'name': 'My Action'})
         self.assertEqual(response.status_code, 200)
         self.assertContains(response, 'value="My Action"')
 
     def testBasicAddPost(self):
         """
-        A smoke test to ensure POST on add_view works.
+        Ensure POST on add_view works.
         """
         post_data = {
             '_popup': '1',
@@ -47,8 +57,7 @@ class AdminCustomUrlsTest(TestCase):
 
     def testAdminUrlsNoClash(self):
         """
-        Test that some admin URLs work correctly. The model has a CharField
+        Test that some admin URLs work correctly.
-        PK and the add_view URL has been customized.
         """
         # Should get the change_view for model instance with PK 'add', not show
         # the add_view
@@ -57,17 +66,28 @@ class AdminCustomUrlsTest(TestCase):
         self.assertContains(response, 'Change action')
 
         # Ditto, but use reverse() to build the URL
-        path = reverse('admin:%s_action_change' % Action._meta.app_label,
+        url = reverse('admin:%s_action_change' % Action._meta.app_label,
                 args=('add',))
-        response = self.client.get(path)
+        response = self.client.get(url)
         self.assertEqual(response.status_code, 200)
         self.assertContains(response, 'Change action')
 
         # Should correctly get the change_view for the model instance with the
-        # funny-looking PK
+        # funny-looking PK (the one wth a 'path/to/html/document.html' value)
-        path = reverse('admin:%s_action_change' % Action._meta.app_label,
+        url = reverse('admin:%s_action_change' % Action._meta.app_label,
                 args=("path/to/html/document.html",))
-        response = self.client.get(path)
+        response = self.client.get(url)
         self.assertEqual(response.status_code, 200)
         self.assertContains(response, 'Change action')
         self.assertContains(response, 'value="path/to/html/document.html"')
+
+    def testChangeViewHistoryButton(self):
+        url = reverse('admin:%s_action_change' % Action._meta.app_label,
+                args=('The name of an action',))
+        response = self.client.get(url)
+        self.assertEqual(response.status_code, 200)
+        expected_link = reverse('admin:%s_action_history' %
+                                Action._meta.app_label,
+                                args=('The name of an action',))
+        self.assertContains(response, '<a href="%s" class="historylink"' %
+                            expected_link)