python
type_error
ai_generated
true
TypeError: NoneType 对象不能用于 'await' 表达式
TypeError: object NoneType can't be used in 'await' expression
ID: python/fastapi-await-none-coroutine
80%修复率
85%置信度
0证据数
2024-12-15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
异步路由 await 了一个实际上是同步的调用(例如同步数据库驱动或返回 None 的函数)。
English
An async route awaits a call that is actually synchronous (e.g. a sync DB driver or a function returning None).
解决方案
-
88% 成功率
Use an async driver or run sync in a threadpool: from starlette.concurrency import run_in_threadpool result = await run_in_threadpool(sync_fn)
-
90% 成功率
Remove await when calling a synchronous function.
无效尝试
常见但无效的做法:
-
60% 失败
Fixes this call but blocks the event loop for other requests.
-
85% 失败
Doesn't make the awaited object awaitable.