class Album(orm.Model):
    registry = models
    fields = {
        "id": orm.Integer(primary_key=True),
        "name": orm.String(max_length=100),
    }


class Track(orm.Model):
    registry = models
    fields = {
        "id": orm.Integer(primary_key=True),
        "album": orm.ForeignKey("Album", on_delete=orm.CASCADE),
        "title": orm.String(max_length=100),
        "position": orm.Integer(),
    }