```Python hl_lines="10"
{!> ../../docs_src/path_params_numeric_validations/tutorial001.py!}
```

////

/// note | "Nota"

Um parâmetro de rota é sempre obrigatório, como se fizesse parte da rota.

Então, você deve declará-lo com `...` para marcá-lo como obrigatório.

Mesmo que você declare-o como `None` ou defina um valor padrão, isso não teria efeito algum, o parâmetro ainda seria obrigatório.

///

{!../../docs_src/using_request_directly/tutorial001.py!}
```

By declaring a *path operation function* parameter with the type being the `Request` **FastAPI** will know to pass the `Request` in that parameter.

/// tip

Note that in this case, we are declaring a path parameter beside the request parameter.

So, the path parameter will be extracted, validated, converted to the specified type and annotated with OpenAPI.

<img src="/img/tutorial/request-form-models/image01.png">
</div>

## Forbid Extra Form Fields

In some special use cases (probably not very common), you might want to **restrict** the form fields to only those declared in the Pydantic model. And **forbid** any **extra** fields.

/// note

This is supported since FastAPI version `0.114.0`. 🤓

///

You can use Pydantic's model configuration to `forbid` any `extra` fields:

///

它可以：

* 在响应中返回状态码
* 在 OpenAPI 概图（及用户界面）中存档：

<img src="/img/tutorial/response-status-code/image01.png">

/// note | "笔记"

某些响应状态码表示响应没有响应体（参阅下一章）。

FastAPI 可以进行识别，并生成表明无响应体的 OpenAPI 文档。

///

## 关于 HTTP 状态码

/// note | "笔记"

如果已经了解 HTTP 状态码，请跳到下一章。

///

在 HTTP 协议中，发送 3 位数的数字状态码是响应的一部分。

这些状态码都具有便于识别的关联名称，但是重要的还是数字。

简言之：

  }

  /**
   * Generates a hash code for multiple values. The hash code is generated by calling {@link
   * Arrays#hashCode(Object[])}. Note that array arguments to this method, with the exception of a
   * single Object array, do not get any special handling; their hash codes are based on identity
   * and not contents.
   *
   * <p>This is useful for implementing {@link Object#hashCode()}. For example, in an object that

Le paramètre de requête `q` a pour type `Union[str, None]` (ou `str | None` en Python 3.10), signifiant qu'il est de type `str` mais pourrait aussi être égal à `None`, et bien sûr, la valeur par défaut est `None`, donc **FastAPI** saura qu'il n'est pas requis.

/// note

**FastAPI** saura que la valeur de `q` n'est pas requise grâce à la valeur par défaut `= None`.

```Python
contents = myfile.file.read()
```

/// note | "Technische Details zu `async`"

Wenn Sie die `async`-Methoden verwenden, führt **FastAPI** die Datei-Methoden in einem <abbr title="Mehrere unabhängige Kindprozesse">Threadpool</abbr> aus und erwartet sie.

///

/// note | "Technische Details zu Starlette"

```

> The admin user running this command needs the "admin:SetTier" and "admin:ListTier" permissions if not running as root.

Using above tier, set up a lifecycle rule with transition:

```
 mc ilm add --expiry-days 365 --transition-days 45 --storage-class "AZURETIER" myminio/srcbucket
```

### Custom Algorithms (SFTP)

Custom algorithms can be specified via command line parameters.
Algorithms are comma separated. 
Note that valid values does not in all cases represent default values.

`--sftp=pub-key-algos=...` specifies the supported client public key
authentication algorithms. Note that this doesn't include certificate types
since those use the underlying algorithm. This list is sent to the client if

* 상태 코드를 OpenAPI 스키마(및 사용자 인터페이스)에 문서화 합니다.

<img src="https://fastapi.tiangolo.com/img/tutorial/response-status-code/image01.png">

/// note | "참고"

어떤 응답 코드들은 해당 응답에 본문이 없다는 것을 의미하기도 합니다 (다음 항목 참고).

이에 따라 FastAPI는 응답 본문이 없음을 명시하는 OpenAPI를 생성합니다.

///

## HTTP 상태 코드에 대하여

/// note | "참고"

만약 HTTP 상태 코드에 대하여 이미 알고있다면, 다음 항목으로 넘어가십시오.

///

HTTP는 세자리의 숫자 상태 코드를 응답의 일부로 전송합니다.