python data_error ai_generated true

fastapi.exceptions.RequestValidationError: 1 validation error for Request\npath -> item_id\n value is not a valid integer (type=type_error.integer)

ID: python/fastapi-path-parameter-conversion-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
87%Confidence
0Evidence
2025-10-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

路径参数类型与声明不符。

generic

中文

路径参数类型与声明不符。

Workarounds

  1. 95% success 
    @app.get('/items/{item_id}')\nasync def get_item(item_id: int):\n    return {'item_id': item_id}
  2. 90% success 
    from fastapi import Path\nitem_id: int = Path(..., ge=1)

Dead Ends

Common approaches that don't work:

  1. 60% fail

    失去类型验证。

  2. 50% fail

    容易出错。