python data_error ai_generated true

sqlalchemy.orm.exc.StaleDataError：对表 'users' 的 UPDATE 语句预期更新 1 行；但只匹配了 0 行。

sqlalchemy.orm.exc.StaleDataError: UPDATE statement on table 'users' expected to update 1 row(s); Only 0 were matched.

ID: python/sqlalchemy-stale-data-issue

其他格式: JSON · Markdown 中文 · English
80%修复率
85%置信度
0证据数
2024-10-01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

乐观并发控制：行被其他事务修改或删除。

English

Optimistic concurrency control: row was modified or deleted by another transaction.

generic

解决方案

  1. 90% 成功率 Refresh object before update. 
    session.refresh(user)
user.name = 'new_name'
session.commit()
  2. 85% 成功率 Use version counter in model. 
    class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    version_id = Column(Integer, nullable=False)
    __mapper_args__ = {'version_id_col': version_id}

无效尝试

常见但无效的做法:

  1. Ignoring the error and retrying without refresh. 80% 失败

    Stale object leads to further inconsistencies.

  2. Disabling versioning entirely. 60% 失败

    Loses concurrency protection; data corruption possible.