[1.1.X] Fixed #11057: having no actions in the admin (actions=None)…

… no longer messes up the layout. Thanks, rvdrijst.

Backport of [11670] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@11671 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/admin/media/css/changelists.css

@@ -53,7 +53,7 @@
     vertical-align: middle;
 }
 
-#changelist table thead th:first-child {
+#changelist table thead th.action-checkbox-column {
     width: 1.5em;
     text-align: center;
 }

django/contrib/admin/templatetags/admin_list.py

@@ -106,6 +106,11 @@ def result_headers(cl):
                     else:
                         header = field_name
                     header = header.replace('_', ' ')
+            # if the field is the action checkbox: no sorting and special class
+            if field_name == 'action_checkbox':
+                yield {"text": header,
+                       "class_attrib": mark_safe(' class="action-checkbox-column"')}
+                continue
 
             # It is a non-field, but perhaps one that is sortable
             admin_order_field = getattr(attr, "admin_order_field", None)

tests/regressiontests/admin_views/tests.py

@@ -1140,6 +1140,16 @@ def test_model_without_action(self):
             '<input type="checkbox" class="action-select"' not in response.content,
             "Found an unexpected action toggle checkboxbox in response"
         )
+        self.assert_('action-checkbox-column' not in response.content,
+            "Found unexpected action-checkbox-column class in response")
+
+    def test_action_column_class(self):
+        "Tests that the checkbox column class is present in the response"
+        response = self.client.get('/test_admin/admin/admin_views/subscriber/')
+        self.assertNotEquals(response.context["action_form"], None)
+        self.assert_('action-checkbox-column' in response.content,
+            "Expected an action-checkbox-column in response")
+
 
     def test_multiple_actions_form(self):
         """