小编Wil*_*ben的帖子

我已经搜索了这个错误，但什么也看不懂。我收到以下错误：

sqlalchemy.exc.AmbiguousForeignKeysError：无法确定关系 Sale.payments 上的父/子表之间的连接条件 - 有多个外键路径链接表。指定“foreign_keys”参数，提供应被视为包含对父表的外键引用的列的列表。

这是我的代码：

# -*- coding: utf-8 -*-

import sqlalchemy as sa
import bcrypt as bc
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import scoped_session, sessionmaker, relationship, backref
from sqlalchemy_utils import database_exists, create_database

engine = sa.create_engine('sqlite:///data/db/nestopol.db')
if not database_exists(engine.url):
    create_database(engine.url)

session = scoped_session(sessionmaker(bind=engine))
Base = declarative_base()


class Staff(Base):

    __tablename__ = 'staffs'

    staff_id = sa.Column(sa.Integer, primary_key=True)
    username = sa.Column(sa.String(64), unique=True, index=True, nullable=False)

    # Needs a length if MySQL is used
    # password is 93 in length
    password = …