Isso significa que, se você quiser atualizar o item `bar` usando `PUT` com um corpo contendo:

```Python
{
    "name": "Barz",
    "price": 3,
    "description": None,
}
```

Como ele não inclui o atributo já armazenado `"tax": 20.2`, o modelo de entrada assumiria o valor padrão de `"tax": 10.5`.

E os dados seriam salvos com esse "novo" `tax` de `10.5`.

                    "clean",
                    "performance:${testProject}PerformanceAdHocTest",
                    tests.map { """--tests "$it"""" }.joinToString(" "),
                    """--warmups 2 --runs 2 --checks none""",
                    "-PtestJavaVersion=${os.perfTestJavaVersion.major}",
                    "-PtestJavaVendor=${os.perfTestJavaVendor.name.lowercase()}",
                    "-PautoDownloadAndroidStudio=true",

		parser := NewParser(ctxt, arch, tokenizer)

		err := tryParse(t, func() {
			parser.Parse()
		})

		switch {
		case err == nil:
			t.Errorf("#%d: %q: want error %q; have none", i, test.input, test.error)
		case !strings.Contains(err.Error(), test.error):
			t.Errorf("#%d: %q: want error %q; have %q", i, test.input, test.error, err)
		}
	}

app = FastAPI()

security = HTTPBearer(auto_error=False)


@app.get("/users/me")
def read_current_user(
    credentials: Optional[HTTPAuthorizationCredentials] = Security(security),
):
    if credentials is None:
        return {"msg": "Create an account first"}
    return {"scheme": credentials.scheme, "credentials": credentials.credentials}


client = TestClient(app)


def test_security_http_bearer():

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/token", auto_error=False)


@app.get("/items/")
async def read_items(token: Optional[str] = Security(oauth2_scheme)):
    if token is None:
        return {"msg": "Create an account first"}
    return {"token": token}


client = TestClient(app)


def test_no_token():
    response = client.get("/items")

    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["query", "q"],
                "msg": "Field required",
                "input": None,
            }
        ]
    }


def test_query_params_str_validations_q_fixedquery(client: TestClient):
    response = client.get("/items/", params={"q": "fixedquery"})
    assert response.status_code == 200

Das bedeutet, dass, wenn Sie den Artikel `bar` aktualisieren wollen, mittels `PUT` und folgendem Body:

```Python
{
    "name": "Barz",
    "price": 3,
    "description": None,
}
```

weil das bereits gespeicherte Attribut `"tax": 20.2` nicht enthalten ist, das Eingabemodell den Defaultwert `"tax": 10.5` erhalten würde.

import subprocess
import time

import httpx
from playwright.sync_api import Playwright, sync_playwright


# Run playwright codegen to generate the code below, copy paste the sections in run()
def run(playwright: Playwright) -> None:
    browser = playwright.chromium.launch(headless=False)
    # Update the viewport manually
    context = browser.new_context(viewport={"width": 960, "height": 1080})
    browser = playwright.chromium.launch(headless=False)

/// tip | 팁

반환 모델이 값이 항상 존재하고 항상 `int`(`None`이 아님)를 보장하는 것은 API 클라이언트에게 매우 유용합니다. 이를 통해 API와 통신하는 개발자가 훨씬 더 간단한 코드를 작성할 수 있습니다.

또한 **자동으로 생성된 클라이언트**는 더 단순한 인터페이스를 제공하므로, API와 소통하는 개발자들이 훨씬 수월하게 작업할 수 있습니다. 😎

///

`HeroPublic`의 모든 필드는 `HeroBase`와 동일하며, `id`는 `int`로 선언됩니다(`None`이 아님):

* `id`
* `name`
* `age`
* `secret_name`

     *
     * @param value The configuration value to preprocess, must not be {@code null}.
     * @param type The target type of the value, may be {@code null}.
     * @return The processed configuration value or {@code null} if none.
     * @throws BeanConfigurationException If an error occurred while preprocessing the value.
     */
    Object preprocessValue(String value, Class<?> type) throws BeanConfigurationException;