Add missing "ref" field to SensorTypeDB model.
@@ -43,6 +43,7 @@ class SensorTypeDB(stormbase.StormBaseDB, stormbase.ContentPackResourceMixin,
UID_FIELDS = ['pack', 'name']
name = me.StringField(required=True)
+ ref = me.StringField(required=True)
pack = me.StringField(required=True, unique_with='name')
artifact_uri = me.StringField()
entry_point = me.StringField()
