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

- **ID:** `python/flask-sqlalchemy-session-not-removed`
- **领域:** python
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

在请求中调用db.session.commit()后继续使用该会话，但未开启新事务。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 2.x | active | — | — |
| 3.x | active | — | — |

## 解决方案

1. **** (90% 成功率)
   ```
   with db.session.begin():\n    db.session.add(obj)
   ```
2. **** (93% 成功率)
   ```
   def view():\n    db.session.add(x)\n    db.session.commit()\n    return 'ok'
   ```

## 无效尝试

- **** — Rollback discards pending changes and does not re-open a usable transaction for the same objects. (70% 失败率)
- **** — Keeps attributes but the session is still in committed state for new queries. (60% 失败率)