3. El dataclass `Author` incluye una lista de dataclasses `Item`.

4. El dataclass `Author` se usa como el parámetro `response_model`.

5. Puedes usar otras anotaciones de tipos estándar con dataclasses como el request body.

    En este caso, es una lista de dataclasses `Item`.

6. Aquí estamos regresando un diccionario que contiene `items`, que es una lista de dataclasses.

                    "message": {
                        "title": "Message",
                        "type": "string"
                    }
                }
            },
            "Item": {
                "title": "Item",
                "required": [
                    "id",
                    "value"
                ],
                "type": "object",
                "properties": {

## Alias parametreleri { #alias-parameters }

Parametrenin adının `item-query` olmasını istediğinizi düşünün.

Örneğin:

```
http://127.0.0.1:8000/items/?item-query=foobaritems
```

Ancak `item-query` geçerli bir Python değişken adı değildir.

En yakın seçenek `item_query` olur.

Ama sizin hâlâ tam olarak `item-query` olmasına ihtiyacınız var...

				continue
			}
			if result.Item.DeleteMarker {
				deleteMarkerCountMap[result.Item.Name]++
			}
			// Apply filter to find the matching rule to apply expiry
			// actions accordingly.
			// nolint:gocritic
			if result.Item.IsLatest {
				var match BatchJobExpireFilter
				var found bool
				for _, rule := range r.Rules {
					if rule.Matches(result.Item, now) {
						match = rule
						found = true

#d6d8db;\n}\n\n.list-group-item-secondary.list-group-item-action:hover, .list-group-item-secondary.list-group-item-action:focus {\n  color: #383d41;\n  background-color: #c8cbcf;\n}\n\n.list-group-item-secondary.list-group-item-action.active {\n  color: #fff;\n  background-color: #383d41;\n  border-color: #383d41;\n}\n\n.list-group-item-success {\n  color: #155724;\n  background-color: #c3e6cb;\n}\n\n.list-group-item-success.list-group-item-action:hover, .list-group-item-success.list-group-item-action:focus {\n...

      "input": null
    }
  ]
}
```

`needy`는 필수 매개변수이므로 URL에 반드시 설정해줘야 합니다:

```
http://127.0.0.1:8000/items/foo-item?needy=sooooneedy
```

...아래처럼 작동합니다:

```JSON
{
    "item_id": "foo-item",
    "needy": "sooooneedy"
}
```

그리고 물론, 일부 매개변수는 필수로, 다른 일부는 기본값을, 또 다른 일부는 선택적으로 선언할 수 있습니다:

{* ../../docs_src/query_params/tutorial006_py310.py hl[8] *}

Jedes mit `yield` zurückgegebene Element wird als JSON kodiert und im Feld `data:` eines SSE-Events gesendet.

Wenn Sie den Rückgabetyp als `AsyncIterable[Item]` deklarieren, verwendet FastAPI ihn, um die Daten mit Pydantic zu **validieren**, zu **dokumentieren** und zu **serialisieren**.

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[1:25] hl[10:12,23] *}

/// tip | Tipp

3. La dataclass `Author` inclut une liste de dataclasses `Item`.

4. La dataclass `Author` est utilisée comme paramètre `response_model`.

5. Vous pouvez utiliser d'autres annotations de type standard avec des dataclasses comme corps de la requête.

    Dans ce cas, il s'agit d'une liste de dataclasses `Item`.

6. Ici, nous renvoyons un dictionnaire qui contient `items`, qui est une liste de dataclasses.

```JSON
{
  "item": "The Foo Wrestlers"
}
```

Pero si el cliente solicita `http://example.com/items/bar` (un `item_id` inexistente `"bar"`), ese cliente recibirá un código de estado HTTP de 404 (el error "no encontrado"), y un response JSON de:

```JSON
{
  "detail": "Item not found"
}
```

/// tip | Consejo

      "input": null
    }
  ]
}
```

`needy` zorunlu bir parametre olduğundan, URL'de ayarlamanız gerekir:

```
http://127.0.0.1:8000/items/foo-item?needy=sooooneedy
```

...bu çalışır:

```JSON
{
    "item_id": "foo-item",
    "needy": "sooooneedy"
}
```