│                                                     │
 │  Serving at: http://127.0.0.1:8000                  │
 │                                                     │
 │  API docs: http://127.0.0.1:8000/docs               │
 │                                                     │
 │  Running in development mode, for production use:   │
 │                                                     │

  /**
   * The HTTP <a
   * href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-Host">{@code
   * X-Forwarded-Host}</a> header field name.
   *
   * @since 20.0
   */
  public static final String X_FORWARDED_HOST = "X-Forwarded-Host";

  /**
   * The HTTP <a
   * href="https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/x-forwarded-headers.html#x-forwarded-port">{@code

    title: The Gold Standard in Retail Account Linking
    img: https://fastapi.tiangolo.com/img/sponsors/subtotal.svg
  - url: https://docs.railway.com/guides/fastapi?utm_medium=integration&utm_source=docs&utm_campaign=fastapi
    title: Deploy enterprise applications at startup speed
    img: https://fastapi.tiangolo.com/img/sponsors/railway.png
silver:

오류에는 정확히 어느 지점에서 검증을 통과하지 못했는지 명시됩니다.

이는 API와 상호 작용하는 코드를 개발하고 디버깅하는 데 매우 유용합니다.

///

## 문서화

그리고 브라우저에서 <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>를 열면, 다음과 같이 자동 대화식 API 문서를 볼 수 있습니다:

<img src="/img/tutorial/path-params/image01.png">

/// check | 확인

그저 파이썬 타입 선언을 하기만 하면 **FastAPI**는 자동 대화형 API 문서(Swagger UI)를 제공합니다.

 <span style="background-color:#C4A000"><font color="#2E3436">│                                                     │</font></span>
 <span style="background-color:#C4A000"><font color="#2E3436">│  API docs: http://127.0.0.1:8000/docs               │</font></span>
 <span style="background-color:#C4A000"><font color="#2E3436">│                                                     │</font></span>

-->
```release-note

```

#### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

<!--
This section can be blank if this pull request does not require a release note.

When adding links which point to resources within git repositories, like
KEPs or supporting documentation, please reference a specific commit and avoid

# 📣 📨 🖼 💽

👆 💪 📣 🖼 💽 👆 📱 💪 📨.

📥 📚 🌌 ⚫️.

## Pydantic `schema_extra`

👆 💪 📣 `example` Pydantic 🏷 ⚙️ `Config` &amp; `schema_extra`, 🔬 <a href="https://docs.pydantic.dev/latest/concepts/json_schema/#customizing-json-schema" class="external-link" target="_blank">Pydantic 🩺: 🔗 🛃</a>:

{* ../../docs_src/schema_extra_example/tutorial001.py hl[15:23] *}

👈 ➕ ℹ 🔜 🚮-🔢 **🎻 🔗** 👈 🏷, &amp; ⚫️ 🔜 ⚙️ 🛠️ 🩺.

/// tip

Это очень полезно при разработке и отладке кода, который взаимодействует с API.

///

## Документация

И теперь, когда откроете браузер по адресу: <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>, то увидите вот такую автоматически сгенерированную документацию API:

<img src="/img/tutorial/path-params/image01.png">

/// check | Заметка

"Mounting" means adding a complete "independent" application in a specific path, that then takes care of handling all the sub-paths.

This is different from using an `APIRouter` as a mounted application is completely independent. The OpenAPI and docs from your main application won't include anything from the mounted application, etc.

You can read more about this in the [Advanced User Guide](../advanced/index.md){.internal-link target=_blank}.

## Details { #details }

* _Đường dẫn_ `/items/{item_id}`  có một _tham số query string_ `q`, nó là một tham số tùy chọn kiểu `str`.

### Tài liệu tương tác API

Truy cập <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

Bạn sẽ thấy tài liệu tương tác API được tạo tự động (cung cấp bởi <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a>):