Add a help_text to pattern of ServicePattern

cas_server/migrations/0003_auto_20151212_1721.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cas_server', '0002_auto_20151212_1300'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='servicepattern',
+            name='pattern',
+            field=models.CharField(help_text="A regular expression matching services. Will usually looks like '^https://some\\.server\\.com/path/.*$'.As it is a regular expression, special character must be escaped with a '\\'.", unique=True, max_length=255, verbose_name='pattern'),
+            preserve_default=True,
+        ),
+    ]