python sqlalchemy多表关联提交

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, relationship
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, ForeignKey

# 创建数据库引擎
engine = create_engine('数据库连接字符串')

# 创建会话工厂
Session = sessionmaker(bind=engine)

# 创建基类
Base = declarative_base()

# 定义模型类
class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    addresses = relationship("Address", back_populates="user")

class Address(Base):
    __tablename__ = 'addresses'
    id = Column(Integer, primary_key=True)
    email = Column(String)
    user_id = Column(Integer, ForeignKey('users.id'))
    user = relationship("User", back_populates="addresses")

# 创建表格
Base.metadata.create_all(engine)

# 创建会话
session = Session()

# 创建用户和地址对象
user = User(name='John')
address = Address(email='john@example.com')

# 关联用户和地址
user.addresses.append(address)

# 提交事务
session.add(user)
session.commit()