```Python hl_lines="6  11"
{!../../docs_src/dependencies/tutorial006.py!}
```

### 触发异常

路径装饰器依赖项与正常的依赖项一样，可以 `raise` 异常：

```Python hl_lines="8  13"
{!../../docs_src/dependencies/tutorial006.py!}
```

### 返回值

无论路径装饰器依赖项是否返回值，路径操作都不会使用这些值。

因此，可以复用在其他位置使用过的、（能返回值的）普通依赖项，即使没有使用这个值，也会执行该依赖项：

```Python hl_lines="9  14"
{!../../docs_src/dependencies/tutorial006.py!}
```

## 为一组路径操作定义依赖项

```Python hl_lines="2  4  8  12  46  64  105  107-115  121-124  128-134  139  155"
{!../../docs_src/security/tutorial005.py!}
```

🔜 ➡️ 📄 👈 🔀 🔁 🔁.

## Oauth2️⃣ 💂‍♂ ⚖

🥇 🔀 👈 🔜 👥 📣 Oauth2️⃣ 💂‍♂ ⚖ ⏮️ 2️⃣ 💪 ↔, `me` & `items`.

`scopes` 🔢 📨 `dict` ⏮️ 🔠 ↔ 🔑 & 📛 💲:

```Python hl_lines="62-65"
{!../../docs_src/security/tutorial005.py!}
```

↩️ 👥 🔜 📣 📚 ↔, 👫 🔜 🎦 🆙 🛠️ 🩺 🕐❔ 👆 🕹-/✔.

例如，`pip install python-multipart`。

///

## 导入 `File` 与 `Form`

```Python hl_lines="1"
{!../../docs_src/request_forms_and_files/tutorial001.py!}
```

## 定义 `File` 与 `Form` 参数

创建文件和表单参数的方式与 `Body` 和 `Query` 一样：

```Python hl_lines="8"
{!../../docs_src/request_forms_and_files/tutorial001.py!}
```

文件和表单字段作为表单数据上传与接收。

声明文件可以使用 `bytes` 或 `UploadFile` 。

/// warning | "警告"

import importlib

from fastapi.testclient import TestClient

from ...utils import needs_pydanticv2


def get_client() -> TestClient:
    from docs_src.conditional_openapi import tutorial001

    importlib.reload(tutorial001)

    client = TestClient(tutorial001.app)
    return client


@needs_pydanticv2
def test_disable_openapi(monkeypatch):
    monkeypatch.setenv("OPENAPI_URL", "")
    # Load the client after setting the env var

///

## 🗄 `File` & `Form`

```Python hl_lines="1"
{!../../docs_src/request_forms_and_files/tutorial001.py!}
```

## 🔬 `File` & `Form` 🔢

✍ 📁 & 📨 🔢 🎏 🌌 👆 🔜 `Body` ⚖️ `Query`:

```Python hl_lines="8"
{!../../docs_src/request_forms_and_files/tutorial001.py!}
```

📁 & 📨 🏑 🔜 📂 📨 📊 & 👆 🔜 📨 📁 & 📨 🏑.

& 👆 💪 📣 📁 `bytes` & `UploadFile`.

```

////

//// tab | Python 3.8 без Annotated

/// подсказка

Рекомендуется использовать версию с Annotated, если возможно.

///

```Python hl_lines="17"
{!> ../../docs_src/dependencies/tutorial006.py!}
```

////

Зависимости из dependencies выполнятся так же, как и обычные зависимости. Но их значения (если они были) не будут переданы в *функцию операции пути*.

/// подсказка

////

//// tab | Python 3.8+ nicht annotiert

/// tip | "Tipp"

Bevorzugen Sie die `Annotated`-Version, falls möglich.

///

```Python hl_lines="1"
{!> ../../docs_src/request_forms_and_files/tutorial001.py!}
```

////

## `File` und `Form`-Parameter definieren

Erstellen Sie Datei- und Formularparameter, so wie Sie es auch mit `Body` und `Query` machen würden:

//// tab | Python 3.9+

```

////

//// tab | Python 3.8 non-Annotated

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="8-9"
{!> ../../docs_src/dependencies/tutorial005.py!}
```

////

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.

```

////

//// tab | Python 3.8+ non-Annotated

/// tip | "İpucu"

Mümkün mertebe 'Annotated' sınıfını kullanmaya çalışın.

///

```Python hl_lines="3"
{!> ../../docs_src/cookie_params/tutorial001.py!}
```

////

## `Cookie` Parametrelerini Tanımlayın

Çerez parametrelerini `Path` veya `Query` tanımlaması yapar gibi tanımlayın.

👫 💪 **⏬** 👆 💪 👫.

**FastAPI** 🔜 ✊ 💅 🔬 👫.

## 🥇 🔗 "☑"

👆 💪 ✍ 🥇 🔗 ("☑") 💖:

//// tab | 🐍 3️⃣.6️⃣ & 🔛

```Python hl_lines="8-9"
{!> ../../docs_src/dependencies/tutorial005.py!}
```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="6-7"
{!> ../../docs_src/dependencies/tutorial005_py310.py!}
```

////

⚫️ 📣 📦 🔢 🔢 `q` `str`, & ⤴️ ⚫️ 📨 ⚫️.