Compatibility with different session backend + admin layout

cas_server/migrations/0021_auto_20150611_2102.py

@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cas_server', '0020_auto_20150609_1917'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='user',
+            name='session_key',
+            field=models.CharField(max_length=40, null=True, blank=True),
+            preserve_default=True,
+        ),
+        migrations.AlterUniqueTogether(
+            name='user',
+            unique_together=set([('username', 'session_key')]),
+        ),
+        migrations.RemoveField(
+            model_name='user',
+            name='session',
+        ),
+    ]