在 GET 请求中使用 pydantic 验证器

问题描述

我正在尝试验证数据库中已有的数据。

我有这个 Pydantic 模型：

class Schema(BaseModel):
    name: str

    @validator("name")
    def name_must_not_contain_spaces(cls,v):
        if ' ' in v:
            raise ValueError("must not contain space")
        return v

这是返回所有对象的 crud 操作的 get_all：

# crud.py
async def get_all() -> List:
    objects = await TestModel.all().values()
    return objects

# TestModel is a Model created with Tortoise-orm. 

这是 GET 端点：

@router.get('/',response_model=List[Schema])
async def get_all_tests() -> List[Schema]:
    return await crud.get_all()

当我尝试 POST 时，它运行良好，在 json 中返回引发的错误。

但是，当我尝试验证数据库中已有的数据时，出现内部服务器错误，并且在终端上有此引用：

ERROR:uvicorn.error:Exception in Asgi application
Traceback (most recent call last):
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/uvicorn/protocols/http/h11_impl.py",line 396,in run_asgi
    result = await app(self.scope,self.receive,self.send)
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/uvicorn/middleware/proxy_headers.py",line 45,in __call__
    return await self.app(scope,receive,send)
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/fastapi/applications.py",line 199,in __call__
    await super().__call__(scope,send)
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/starlette/applications.py",line 112,in __call__
    await self.middleware_stack(scope,send)
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/starlette/middleware/errors.py",line 181,in __call__
    raise exc from None
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/starlette/middleware/errors.py",line 159,in __call__
    await self.app(scope,_send)
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/starlette/exceptions.py",line 82,in __call__
    raise exc from None
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/starlette/exceptions.py",line 71,sender)
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/starlette/routing.py",line 580,in __call__
    await route.handle(scope,send)
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/starlette/routing.py",line 241,in handle
    await self.app(scope,line 52,in app
    response = await func(request)
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/fastapi/routing.py",line 209,in app
    response_data = await serialize_response(
  File "/Users/Library/Caches/pypoetry/virtualenvs/fastapi-version-bfOHfHp9-py3.8/lib/python3.8/site-packages/fastapi/routing.py",line 126,in serialize_response
    raise ValidationError(errors,field.type_)
pydantic.error_wrappers.ValidationError: 1 validation error for Schema
response -> 5 -> name
  must not contain space (type=value_error)

我想要正是这个错误，但作为响应正文中显示的json响应

解决方法

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