participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,tasks: Can raise exception for dependency, handled after response is sent
    Note over client,operation: Can raise HTTPException and can change the response
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise
        dep -->> handler: Raise HTTPException

      - uses: docker://tiangolo/latest-changes:0.3.0
      # - uses: tiangolo/latest-changes@main
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          latest_changes_file: docs/en/docs/release-notes.md
          latest_changes_header: '## Latest Changes'
          end_regex: '^## '
          debug_logs: true

!!! note
    Notice that as we communicate with the database using `await`, the *path operation function* is declared with `async`.

### About `{**note.dict(), "id": last_record_id}`

`note` is a Pydantic `Note` object.

`note.dict()` returns a `dict` with its data, something like:

```Python
{
    "text": "Some note",
    "completed": False,
}
```

Podrías poner tu contenido XML en un string, ponerlo en una `Response` y devolverlo:

```Python hl_lines="1  18"
{!../../../docs_src/response_directly/tutorial002.py!}
```

## Notas

Cuando devuelves una `Response` directamente, los datos no son validados, convertidos (serializados), ni documentados automáticamente.

```Python hl_lines="19-24 28"
{!../../../docs_src/additional_responses/tutorial002.py!}
```

!!! note "Remarque"
    Notez que vous devez retourner l'image en utilisant directement un `FileResponse`.

!!! info

contents = await myfile.read()
```

만약 일반적인 `def` *경로 작동 함수*의 내부라면, 다음과 같이 `UploadFile.file` 에 직접 접근할 수 있습니다:

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

!!! note  "`async` 기술적 세부사항"
    `async` 메소드들을 사용할 때 **FastAPI**는 스레드풀에서 파일 메소드들을 실행하고 그들을 기다립니다.

!!! note "Starlette 기술적 세부사항"
    **FastAPI**의 `UploadFile` 은 **Starlette**의 `UploadFile` 을 직접적으로 상속받지만, **Pydantic** 및 FastAPI의 다른 부분들과의 호환성을 위해 필요한 부분들이 추가되었습니다.

## "폼 데이터"란

* It then takes the **response** generated by the application (by some *path operation*).
* It can do something to that **response** or run any needed code.
* Then it returns the **response**.

!!! note "Technical Details"
    If you have dependencies with `yield`, the exit code will run *after* the middleware.

    If there were any background tasks (documented later), they will run *after* all the middleware.

* Sie kann etwas mit dieser **Response** tun oder beliebigen Code ausführen.
* Dann gibt sie die **Response** zurück.

!!! note "Technische Details"
    Wenn Sie Abhängigkeiten mit `yield` haben, wird der Exit-Code *nach* der Middleware ausgeführt.

    Wenn es Hintergrundaufgaben gab (später dokumentiert), werden sie *nach* allen Middlewares ausgeführt.

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

🚥 👆 🔘 😐 `def` *➡ 🛠️ 🔢*, 👆 💪 🔐 `UploadFile.file` 🔗, 🖼:

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

!!! note "`async` 📡 ℹ"
    🕐❔ 👆 ⚙️ `async` 👩‍🔬, **FastAPI** 🏃 📁 👩‍🔬 🧵 & ⌛ 👫.

!!! note "💃 📡 ℹ"
    **FastAPI**'Ⓜ `UploadFile` 😖 🔗 ⚪️➡️ **💃**'Ⓜ `UploadFile`, ✋️ 🚮 💪 🍕 ⚒ ⚫️ 🔗 ⏮️ **Pydantic** & 🎏 🍕 FastAPI.

## ⚫️❔ "📨 💽"

## 用 `PATCH` 进行部分更新

<a href="https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Methods/PATCH" class="external-link" target="_blank">HTTP `PATCH`</a> 操作用于更新 *部分* 数据。

即，只发送要更新的数据，其余数据保持不变。

!!! note "笔记"

    `PATCH` 没有 `PUT` 知名，也怎么不常用。

    很多人甚至只用 `PUT` 实现部分更新。

    **FastAPI** 对此没有任何限制，可以**随意**互换使用这两种操作。

    但本指南也会分别介绍这两种操作各自的用途。

### 使用 Pydantic 的 `exclude_unset` 参数