想问下 sqlalchemy1.4 的异步模式有人试过么 - V2EX
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zyxbcde

想问下 sqlalchemy1.4 的异步模式有人试过么

  •  
  •   zyxbcde Apr 2, 2021 via Android 2709 views
    This topic created in 1853 days ago, the information mentioned may be changed or developed.

    这里是一个被开发逼着写代码的菜鸡商务。

    sqlalchemy 出了 1.4 以后想试试异步模式,就找了个 mysql 数据库写了几行测试。

    import asyncio

    from sqlalchemy.ext.asyncio import create_async_engine

    from sqlalchemy.ext.asyncio import AsyncSession

    async def main():

    engine = create_async_engine("mysql+aiomysql://root:[email protected]:3333/test") session = AsyncSession(engine) await session.execute("select * from students") await session.close() 

    if name == 'main':

    asyncio.run(main()) 

    然后在 aiomysql 连接关闭的时候报错 event loop is closed,我感觉我的代码写的没问题啊,就这么三四行,然后我还不甘心把官方文档里的例子改成 aiomysql 丢进去还是一样的错。

    想请试过的大神给指导下

    4 replies    2021-04-02 19:29:18 +08:00
    Te11UA
        1
    Te11UA  
       Apr 2, 2021
    目测用的是 Windows
    Linux 环境应该不会了
    Wincer
        2
    Wincer  
       Apr 2, 2021
    没用过异步模式,但是你的写法似乎与官方文档的不太一致。https://docs.sqlalchemy.org/en/14/orm/extensions/asyncio.html,文档里是使用 async with async_session() as session: 这样来创造 session 的,你可以按文档里说的试试
    zyxbcde
        3
    zyxbcde  
    OP
       Apr 2, 2021 via Android
    @Te11UA 怀疑过,我甚至把 python 删了重装了一遍,等回公司试试。
    zyxbcde
        4
    zyxbcde  
    OP
       Apr 2, 2021 via Android
    @Wincer 异步模式刚出的,我也是试试,不过这里跟 with 没关系,用 with 也是一样的错。
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