python data_error ai_generated true

sqlalchemy.orm.exc.StaleDataError: 表 'users' 上的 UPDATE 语句预期匹配 1 行；实际找到 0 行

sqlalchemy.orm.exc.StaleDataError: UPDATE statement on table 'users' expected to match 1 row(s); 0 found

ID: python/sqlalchemy-stale-data-read

其他格式: JSON · Markdown 中文 · English
80%修复率
85%置信度
0证据数
2024-12-01首次发现

版本兼容性

版本状态引入弃用备注
3.x active — — —

根因分析

乐观并发检查失败，因为自读取以来该行已被其他事务修改或删除。

English

An optimistic concurrency check failed because the row was modified or deleted by another transaction since it was read.

generic

解决方案

  1. 95% 成功率 Re-query the object before updating 
    user = session.query(User).get(user_id)
if user:
    user.name = 'New Name'
    session.commit()
  2. 90% 成功率 Use session.refresh() to reload the object 
    session.refresh(user)
user.name = 'New Name'
session.commit()

无效尝试

常见但无效的做法:

  1. Ignoring the error and retrying the update 60% 失败

    The row may have been deleted, so the update will still fail.

  2. Disabling versioning in the model 80% 失败

    This removes concurrency protection, leading to potential data corruption.