## Importar `Field` { #import-field }

Primero, tienes que importarlo:

{* ../../docs_src/body_fields/tutorial001_an_py310.py hl[4] *}

/// warning | Advertencia

Fíjate que `Field` se importa directamente desde `pydantic`, no desde `fastapi` como el resto (`Query`, `Path`, `Body`, etc).

///

**FastAPI** will take care of solving them.

## First dependency "dependable" { #first-dependency-dependable }

You could create a first dependency ("dependable") like:

{* ../../docs_src/dependencies/tutorial005_an_py310.py hl[8:9] *}

It declares an optional query parameter `q` as a `str`, and then it just returns it.

This is quite simple (not very useful), but will help us focus on how the sub-dependencies work.

{* ../../docs_src/security/tutorial005_an_py310.py hl[5,9,13,47,65,106,108:116,122:126,130:136,141,157] *}

Sehen wir uns diese Änderungen nun Schritt für Schritt an.

## OAuth2-Sicherheitsschema { #oauth2-security-scheme }

**FastAPI** se encargará de resolverlas.

## Primera dependencia "dependable" { #first-dependency-dependable }

Podrías crear una primera dependencia ("dependable") así:

{* ../../docs_src/dependencies/tutorial005_an_py310.py hl[8:9] *}

Declara un parámetro de query opcional `q` como un `str`, y luego simplemente lo devuelve.

Esto es bastante simple (no muy útil), pero nos ayudará a centrarnos en cómo funcionan las sub-dependencias.

{* ../../docs_src/security/tutorial002_an_py310.py hl[25] *}

## Get the user { #get-the-user }

`get_current_user` will use a (fake) utility function we created, that takes a token as a `str` and returns our Pydantic `User` model:

{* ../../docs_src/security/tutorial002_an_py310.py hl[19:22,26:27] *}

## Inject the current user { #inject-the-current-user }

{* ../../docs_src/security/tutorial002_an_py310.py hl[25] *}

## Den Benutzer abrufen { #get-the-user }

`get_current_user` wird eine von uns erstellte (gefakte) Hilfsfunktion verwenden, welche einen Token vom Typ `str` entgegennimmt und unser Pydantic-`User`-Modell zurückgibt:

{* ../../docs_src/security/tutorial002_an_py310.py hl[19:22,26:27] *}

## 例子

下面是一个*路径操作*的示例，其中的参数使用了上面的一些类型。

{* ../../docs_src/extra_data_types/tutorial001_an_py310.py hl[1,3,12:16] *}

注意，函数内的参数有原生的数据类型，你可以，例如，执行正常的日期操作，如:

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[3] *}

## `Cookie`-Parameter deklarieren { #declare-cookie-parameters }

Deklarieren Sie dann die Cookie-Parameter mit derselben Struktur wie bei `Path` und `Query`.

Sie können den Defaultwert sowie alle zusätzlichen Validierungen oder Annotierungsparameter definieren:

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[9] *}

/// note | Technische Details

## `Cookie` 임포트

먼저 `Cookie`를 임포트합니다:

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[3] *}

## `Cookie` 매개변수 선언

그런 다음, `Path`와 `Query`처럼 동일한 구조를 사용하는 쿠키 매개변수를 선언합니다.

첫 번째 값은 기본값이며, 추가 검증이나 어노테이션 매개변수 모두 전달할 수 있습니다:

{* ../../docs_src/cookie_params/tutorial001_an_py310.py hl[9] *}

/// note | 기술 세부사항

`Cookie`는 `Path` 및 `Query`의 "자매"클래스입니다. 이 역시 동일한 공통 `Param` 클래스를 상속합니다.

{* ../../docs_src/security/tutorial002_an_py310.py hl[25] *}

## Obter o usuário { #get-the-user }

`get_current_user` usará uma função utilitária (falsa) que criamos, que recebe um token como uma `str` e retorna nosso modelo Pydantic `User`:

{* ../../docs_src/security/tutorial002_an_py310.py hl[19:22,26:27] *}

## Injetar o usuário atual { #inject-the-current-user }