Finalzed Python 3 Support

mfa/migrations/0005_auto_20181115_2014.py

@@ -5,8 +5,13 @@ from django.db import models, migrations
 import jsonfield.fields
 
 
-class Migration(migrations.Migration):
+def modify_json(apps, schema_editor):
+    from django.conf import settings
+    if "mysql" in settings.DATABASES.get("default", {}).get("engine", ""):
+        migrations.RunSQL("alter table mfa_user_keys modify column properties json;")
 
+
+class Migration(migrations.Migration):
     dependencies = [
         ('mfa', '0004_user_keys_enabled'),
     ]
@@ -21,5 +26,5 @@ class Migration(migrations.Migration):
             name='properties',
             field=jsonfield.fields.JSONField(null=True),
         ),
-        migrations.RunSQL("alter table mfa_user_keys modify column properties json;")
+        migrations.RunPython(modify_json)
     ]