Add migrations to django 1.11.

evennia/help/migrations/0002_auto_20170606_1731.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.2 on 2017-06-06 17:31
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('help', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='helpentry',
+            name='db_tags',
+            field=models.ManyToManyField(blank=True, help_text=b'tags on this object. Tags are simple string markers to identify, group and alias objects.', to='typeclasses.Tag'),
+        ),
+    ]

evennia/help/models.py

@@ -58,7 +58,7 @@ class HelpEntry(SharedMemoryModel):
     # lock string storage
     db_lock_storage = models.TextField('locks', blank=True, help_text='normally view:all().')
     # tags are primarily used for permissions
-    db_tags = models.ManyToManyField(Tag, null=True,
+    db_tags = models.ManyToManyField(Tag, blank=True,
             help_text='tags on this object. Tags are simple string markers to identify, group and alias objects.')
     # (deprecated, only here to allow MUX helpfile load (don't use otherwise)).
     # TODO: remove this when not needed anymore.