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  2. github.com/tiangolo/fastapi

    docs/zh/docs/tutorial/query-param-models.md 

    这将允许你在**多个地方**去**复用模型**，并且一次性为所有参数声明验证和元数据。😎

/// note

FastAPI 从 `0.115.0` 版本开始支持这个特性。🤓

///

## 使用 Pydantic 模型的查询参数

在一个 **Pydantic 模型**中声明你需要的**查询参数**，然后将参数声明为 `Query`：

{* ../../docs_src/query_param_models/tutorial001_an_py310.py hl[9:13,17] *}

**FastAPI** 将会从请求的**查询参数**中**提取**出**每个字段**的数据，并将其提供给你定义的 Pydantic 模型。

## 查看文档

你可以在 `/docs` 页面的 UI 中查看查询参数：

<div class="screenshot">
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  3. github.com/tiangolo/fastapi

    docs/en/docs/how-to/custom-request-and-route.md 

    {* ../../docs_src/custom_request_and_route/tutorial002_an_py310.py hl[14,16] *}

If an exception occurs, the`Request` instance will still be in scope, so we can read and make use of the request body when handling the error:

{* ../../docs_src/custom_request_and_route/tutorial002_an_py310.py hl[17:19] *}

## Custom `APIRoute` class in a router { #custom-apiroute-class-in-a-router }
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  4. github.com/tiangolo/fastapi

    docs_src/additional_status_codes/tutorial001_an_py310.py 

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  5. github.com/tiangolo/fastapi

    docs_src/websockets/tutorial002_an_py310.py 

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  6. github.com/tiangolo/fastapi

    docs_src/header_param_models/tutorial001_an_py310.py 

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  7. github.com/tiangolo/fastapi

    docs_src/pydantic_v1_in_v2/tutorial002_an_py310.py 

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  8. github.com/tiangolo/fastapi

    docs_src/query_param_models/tutorial002_an_py310.py 

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  9. github.com/tiangolo/fastapi

    docs_src/query_params_str_validations/tutorial003_an_py310.py 

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  10. github.com/tiangolo/fastapi

    docs_src/query_params_str_validations/tutorial004_an_py310.py 

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  11. github.com/tiangolo/fastapi

    docs_src/background_tasks/tutorial002_an_py310.py 

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