python runtime_error ai_generated true

sqlalchemy.exc.InvalidRequestError: 此会话处于 'prepared' 状态；在此事务中无法再发出 SQL。

sqlalchemy.exc.InvalidRequestError: This session is in 'prepared' state; no further SQL can be emitted within this transaction.

ID: python/sqlalchemy-missing-session-rollback-after-error

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80%修复率
84%置信度
0证据数
2024-06-20首次发现

版本兼容性

版本状态引入弃用备注
1.4.x active — — —
2.0.x active — — —

根因分析

提交失败后，会话进入 'prepared' 状态（两阶段提交），需要回滚后才能进行后续操作。

English

After a failed commit, the session enters a 'prepared' state (two-phase commit) and requires rollback before further operations.

generic

解决方案

  1. 95% 成功率 
    Call session.rollback() after catching any commit exception: try: session.commit() except: session.rollback() raise
  2. 90% 成功率 
    Use session.begin() context manager which auto-rolls-back on exception.

无效尝试

常见但无效的做法:

  1. 100% 失败

    The session is stuck; a rollback is required first.

  2. 70% 失败

    May leave database locks or transactions hanging.