Actually add the migration in question...

evennia/typeclasses/migrations/0007_tag_migrations_may_be_slow.py

@@ -0,0 +1,74 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.11 on 2017-01-25 22:30
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+def update_tags_with_dbmodel(apps, schema_editor):
+
+    Tag = apps.get_model('typeclasses', 'Tag')
+
+    ObjectDB = apps.get_model('objects', 'ObjectDB')
+    for obj in ObjectDB.objects.all().exclude(db_tags__db_model="objectdb"):
+        for tag in obj.db_tags.all().exclude(db_model="objectdb"):
+            obj.db_tags.remove(tag)
+            newtag = Tag(db_key=tag.db_key, db_category=tag.db_category,
+                         db_data=tag.db_data, db_tagtype=tag.db_tagtype, db_model="objectdb")
+            newtag.save()
+            obj.db_tags.add(newtag)
+
+    PlayerDB = apps.get_model('players', 'PlayerDB')
+    for obj in PlayerDB.objects.all().exclude(db_tags__db_model="playerdb"):
+        for tag in obj.db_tags.all().exclude(db_model="playerdb"):
+            obj.db_tags.remove(tag)
+            newtag = Tag(db_key=tag.db_key, db_category=tag.db_category,
+                         db_data=tag.db_data, db_tagtype=tag.db_tagtype, db_model="playerdb")
+            newtag.save()
+            obj.db_tags.add(newtag)
+
+    ScriptDB = apps.get_model('scripts', 'ScriptDB')
+    for obj in ScriptDB.objects.all().exclude(db_tags__db_model="scriptdb"):
+        for tag in obj.db_tags.all().exclude(db_model="scriptdb"):
+            obj.db_tags.remove(tag)
+            newtag = Tag(db_key=tag.db_key, db_category=tag.db_category,
+                         db_data=tag.db_data, db_tagtype=tag.db_tagtype, db_model="scriptdb")
+            newtag.save()
+            obj.db_tags.add(newtag)
+
+    ChannelDB = apps.get_model('comms', 'ChannelDB')
+    for obj in ChannelDB.objects.all().exclude(db_tags__db_model="channeldb"):
+        for tag in obj.db_tags.all().exclude(db_model="channeldb"):
+            obj.db_tags.remove(tag)
+            newtag = Tag(db_key=tag.db_key, db_category=tag.db_category,
+                         db_data=tag.db_data, db_tagtype=tag.db_tagtype, db_model="channeldb")
+            newtag.save()
+            obj.db_tags.add(newtag)
+
+    HelpEntry = apps.get_model('help', 'HelpEntry')
+    for obj in HelpEntry.objects.all().exclude(db_tags__db_model="helpentry"):
+        for tag in obj.db_tags.all().exclude(db_model="helpentry"):
+            obj.db_tags.remove(tag)
+            newtag = Tag(db_key=tag.db_key, db_category=tag.db_category,
+                         db_data=tag.db_data, db_tagtype=tag.db_tagtype, db_model="helpentry")
+            newtag.save()
+            obj.db_tags.add(newtag)
+
+    Msg = apps.get_model('comms', 'Msg')
+    for obj in Msg.objects.all().exclude(db_tags__db_model="msg"):
+        for tag in obj.db_tags.all().exclude(db_model="msg"):
+            obj.db_tags.remove(tag)
+            newtag = Tag(db_key=tag.db_key, db_category=tag.db_category,
+                         db_data=tag.db_data, db_tagtype=tag.db_tagtype, db_model="msg")
+            newtag.save()
+            obj.db_tags.add(newtag)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('typeclasses', '0006_auto_add_dbmodel_value_for_tags_attributes'),
+    ]
+
+    operations = [
+            migrations.RunPython(update_tags_with_dbmodel)
+    ]