python
type_error
ai_generated
true
TypeError: '<=' not supported between instances of 'str' and 'int'
ID: python/fastapi-path-param-type-mismatch
80%Fix Rate
87%Confidence
0Evidence
2024-05-12First Seen
Version Compatibility
| Version | Status | Introduced | Deprecated | Notes |
|---|---|---|---|---|
| 3.x | active | — | — | — |
Root Cause
FastAPI路径参数声明为int但实际传入字符串,且在比较操作中未转换。
generic中文
FastAPI路径参数声明为int但实际传入字符串,且在比较操作中未转换。
Workarounds
-
98% success 确保FastAPI路径参数类型注解正确,框架自动转换
from fastapi import FastAPI; app = FastAPI(); @app.get('/items/{item_id}') async def read_item(item_id: int): return {'item_id': item_id} -
95% success 使用Path参数验证器确保类型
from fastapi import Path; @app.get('/items/{item_id}') async def read_item(item_id: int = Path(..., ge=1)): return {'item_id': item_id}
Dead Ends
Common approaches that don't work:
-
在路由函数内部添加类型检查并手动转换
60% fail
代码冗余且容易遗漏。
-
使用str类型接受参数再转换
50% fail
失去类型验证优势。