如何定义间接相关实体之间的SQLAlchemy关系，跨多个表连接？

Question

假设我有以下数据库模型：

Person:
    id

Account:
    id
    person_id -> Person.id

AccountPhoto:
    id
    account_id -> Account.id
    photo_id -> Photo.id

Photo:
    id

如何在SQLAlchemy中定义Person.photos关系？你知道吗

我遇到的困难是，它需要以适当的方式将所有表连接在一起，从而有效地运行查询：

SELECT * FROM Photo
    JOIN AccountPhoto ON Photo.id = AccountPhoto.photo_id
    JOIN Account ON Account.id = AccountPhoto.account_id
    JOIN Person ON Person.id = Account.person_id
WHERE Person.id=?;