from pypika_orm import Model, fields

    class Role(Model):
        id = fields.Auto()
        name = fields.Varchar(max_length=100, default='user')

    class User(Model):
        id = fields.Auto()
        name = fields.Varchar()
        is_active = fields.Bool(default=True, null=False)

        role_id = fields.ForeignKey(Role.id)

    from pypika_orm import Manager

    async with Manager('sqlite:///:memory:') as manager:
        await manager(Role).create_table().if_not_exists().execute()
        await manager(User).create_table().if_not_exists().execute()

        await manager(Role).insert(name='user').execute()
        await manager(User).insert(name='jim', role_id=1).execute()

        [user] = await manager(User).select().fetchall()
        assert user