... and the Case of the Missing Migration

b2b3de7 introduced a ordering on -published_at. At the time, it
evidently wasn't noticed that this—apparently—merited a
migration. (Indeed, would the migrations framework's predecessor South
have generated one here?—but perhaps we prefer not to dwell on that
time.)

core/migrations/0009_auto_20151020_0455.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0008_auto_20150311_0549'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='post',
+            options={'ordering': ('-published_at',)},
+        ),
+    ]