app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):

## ➕1️⃣ 🕹 ⏮️ `APIRouter`

➡️ 💬 👆 ✔️ 🔗 💡 🚚 "🏬" ⚪️➡️ 👆 🈸 🕹 `app/routers/items.py`.

👆 ✔️ *➡ 🛠️* :

* `/items/`
* `/items/{item_id}`

⚫️ 🌐 🎏 📊 ⏮️ `app/routers/users.py`.

✋️ 👥 💚 🙃 & 📉 📟 🍖.

👥 💭 🌐 *➡ 🛠️* 👉 🕹 ✔️ 🎏:

* ➡ `prefix`: `/items`.
* `tags`: (1️⃣ 🔖: `items`).
* ➕ `responses`.
* `dependencies`: 👫 🌐 💪 👈 `X-Token` 🔗 👥 ✍.

예를 들면, 여러분이 4개의 API 엔드포인트(*경로 작동*)를 가지고 있다고 해봅시다:

* `/items/public/`
* `/items/private/`
* `/users/{user_id}/activate`
* `/items/pro/`

그 다음 각각에 대해 그저 의존성과 하위 의존성을 사용하여 다른 권한 요구 사항을 추가할 수 있을 겁니다:

```mermaid
graph TB

current_user(["current_user"])
active_user(["active_user"])
admin_user(["admin_user"])
paying_user(["paying_user"])

public["/items/public/"]
private["/items/private/"]

```

En este caso, si vas a:

```
http://127.0.0.1:8000/items/foo?short=1
```

o

```
http://127.0.0.1:8000/items/foo?short=True
```

o

```
http://127.0.0.1:8000/items/foo?short=true
```

o

```
http://127.0.0.1:8000/items/foo?short=on
```

o

```
http://127.0.0.1:8000/items/foo?short=yes
```

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

Der Wert des Pfad-Parameters `item_id` wird Ihrer Funktion als das Argument `item_id` übergeben.

Wenn Sie dieses Beispiel ausführen und auf <a href="http://127.0.0.1:8000/items/foo" class="external-link" target="_blank">http://127.0.0.1:8000/items/foo</a> gehen, sehen Sie als Response:

```JSON
{"item_id":"foo"}
```

## Pfad-Parameter mit Typen

// or a string representing a sub-field or item. The string will follow one of these four formats:
// 'f:<name>', where <name> is the name of a field in a struct, or key in a map
// 'v:<value>', where <value> is the exact json formatted value of a list item
// 'i:<index>', where <index> is position of a item in a list
// 'k:<keys>', where <keys> is a map of  a list item's key fields to their unique values

Nesse caso, se você for para:

```
http://127.0.0.1:8000/items/foo?short=1
```

ou

```
http://127.0.0.1:8000/items/foo?short=True
```

ou

```
http://127.0.0.1:8000/items/foo?short=true
```

ou

```
http://127.0.0.1:8000/items/foo?short=on
```

ou

```
http://127.0.0.1:8000/items/foo?short=yes
```

```
http://127.0.0.1:8000/items/foo?short=1
```

или

```
http://127.0.0.1:8000/items/foo?short=True
```

или

```
http://127.0.0.1:8000/items/foo?short=true
```

или

```
http://127.0.0.1:8000/items/foo?short=on
```

или

```
http://127.0.0.1:8000/items/foo?short=yes
```

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}


@app.put("/items/{item_id}")
def update_item(item_id: int, item: Item):

Die *Pfadoperation* selbst deklariert auch einen Scope, `"items"`, sodass dieser auch in der Liste der `security_scopes.scopes` enthalten ist, die an `get_current_user` übergeben wird.

So sieht die Hierarchie der Abhängigkeiten und Scopes aus:

* Die *Pfadoperation* `read_own_items` hat:
    * Erforderliche Scopes `["items"]` mit der Abhängigkeit:
    * `get_current_active_user`: