'NoneType' 对象在 SQLAlchemy Query().filter_by().all() 对象中没有属性 '_autoflush'

如何解决'NoneType' 对象在 SQLAlchemy Query().filter_by().all() 对象中没有属性 '_autoflush'

从表中获取所有数据时在 sqlAlchemy 查询中遇到问题 当我使用 .all() mathod

时它会引发错误

这里有错误：

File "./individual/admin/handler.py",line 69,in test_account_indiv
    query = Query(User).filter_by(account_type="INDIVIDUAL",is_deleted=0).all()
  File "/home/awaiskaleem/Documents/backend-api-develop/venv/lib/python3.8/site-packages/sqlalchemy/orm/query.py",line 3341,in all
    return list(self)
  File "/home/awaiskaleem/Documents/backend-api-develop/venv/lib/python3.8/site-packages/sqlalchemy/orm/query.py",line 3502,in __iter__
    self.session._autoflush()
**AttributeError: 'NoneType' object has no attribute '_autoflush'**

代码如下：

query = Query(User).filter_by(account_type="INDIVIDUAL",is_deleted=0).all()

rows = query.with_session(session)

    only = ("id","full_name","status","default_address.id","default_address.region.id","default_address.region.name","tags.tag","tags.hex_color","assigned_region_workers.region_worker.worker.id","assigned_region_workers.region_worker.worker.full_name")

    schema = UserSchema(only=only,many=True)

    result = schema.dump(rows)

这里是连接：

session_maker = sessionmaker()

USER = os.getenv('DB_USER')
PASSWORD = os.getenv('DB_PASSWORD')
URL = os.getenv('DB_URL')
DB = os.getenv('DB_NAME')

try:
    logger.info("Attempting connect to: mysql+pymysql://%s:%s@%s/%s",USER,PASSWORD,URL,DB)
    engine = create_engine("mysql+pymysql://%s:%s@%s/%s" % (USER,DB),pool_size=1)
    engine.connect()
    logger.info("Connected to: mysql+pymysql://%s:%s@%s/%s",DB)
    
except SQLAlchemyError as error:
    logger.error("Error connecting to DB")
    logger.error(error)
else:
    session_maker.configure(bind=engine)

Session = session_maker()

我正在使用 MySQL 数据库和 SQLAlchemy ORM 模型在本地主机上开发基于 AWS Lembda 的无服务器项目 一切都在 ubuntu 中使用 dockers 在虚拟环境中设置

请帮帮我 感谢提前

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