python data_error ai_generated true

fastapi.exceptions.ResponseValidationError: 1 validation error for Response\nvalue is not a valid dict (type=type_error.dict)

ID: python/fastapi-response-model-validation-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2025-04-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

响应模型与返回的数据类型不匹配。

generic

中文

响应模型与返回的数据类型不匹配。

Workarounds

  1. 90% success 
    from pydantic import BaseModel\nclass Item(BaseModel):\n    name: str\n    price: float\[email protected]('/items/{id}', response_model=Item)\nasync def get_item(id: int):\n    return {'name': 'Foo', 'price': 10.5}
  2. 85% success 
    app.get('/items', response_model=Item, response_model_exclude_unset=True)

Dead Ends

Common approaches that don't work:

  1. 60% fail

    可能丢失数据或引发其他错误。

  2. 70% fail

    失去 API 文档和验证优势。