Esto significaría que **FastAPI** esperaría un cuerpo similar a:

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2,
    "tags": ["rock", "metal", "bar"],
    "image": {
        "url": "http://example.com/baz.jpg",
        "name": "The Foo live"
    }
}
```

Nuevamente, haciendo solo esa declaración, con **FastAPI** obtienes:

@app.post("/")
async def post(
    foo: Foo | None = None,
):
    return foo


client = TestClient(app)


def test_call_invalid():
    response = client.post("/", json={"foo": {"bar": "baz"}})
    assert response.status_code == 422


def test_call_valid():
    response = client.post("/", json={})
    assert response.status_code == 200
    assert response.json() == {}

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

Mais si le client demande `http://example.com/items/bar` (un `item_id` inexistant « bar »), il recevra un code d'état HTTP 404 (l'erreur « not found ») et une réponse JSON :

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

/// tip | Astuce

   */
  private static @Nullable Path getParentPath(Path path) {
    Path parent = path.getParent();

    // Paths that have a parent:
    if (parent != null) {
      // "/foo" ("/")
      // "foo/bar" ("foo")
      // "C:\foo" ("C:\")
      // "\foo" ("\" - current drive for process on Windows)
      // "C:foo" ("C:" - working dir of drive C on Windows)
      return parent;
    }

    assert response.status_code == 200, response.text
    assert response.json() == {"id": "foo", "value": "there goes my hero"}


def test_path_operation_not_found():
    response = client.get("/items/bar")
    assert response.status_code == 404, response.text
    assert response.json() == {"message": "Item not found"}


def test_openapi_schema():
    response = client.get("/openapi.json")

        "description": "Item description",
        "price": 3,
        "tax": 10.5,
        "tags": ["tag1", "tag2"],
    }


def test_patch_name(client: TestClient):
    response = client.patch(
        "/items/bar",
        json={"name": "Barz"},
    )
    assert response.json() == {
        "name": "Barz",
        "description": "The bartenders",
        "price": 62,
        "tax": 20.2,
        "tags": [],
    }

{* ../../docs_src/body_updates/tutorial001_py310.py hl[28:33] *}

`PUT`, mevcut verinin yerine geçmesi gereken veriyi almak için kullanılır.

### Değiştirerek güncelleme uyarısı { #warning-about-replacing }

Bu, `bar` öğesini `PUT` ile, body içinde şu verilerle güncellemek isterseniz:

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

请求为 `http://example.com/items/foo`（`item_id` 为 `"foo"`）时，客户端会接收到 HTTP 状态码 200 及如下 JSON 响应结果：

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

但如果客户端请求 `http://example.com/items/bar`（不存在的 `item_id` `"bar"`），则会接收到 HTTP 状态码 404（“未找到”错误）及如下 JSON 响应结果：

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

/// tip | 提示

触发 `HTTPException` 时，可以用参数 `detail` 传递任何能转换为 JSON 的值，不仅限于 `str`。

    assert data == response.json()


@pytest.mark.parametrize(
    "path", ["/a/compute", "/a/compute/", "/b/compute", "/b/compute/"]
)
def test_post_invalid(path):
    data = {"a": "bar", "b": "foo"}
    response = client.post(path, json=data)
    assert response.status_code == 422, response.text


def test_openapi_schema():
    response = client.get("/openapi.json")

        helper.offer(new LogNotificationEvent(1000L, "ERROR", "com.example.Foo", "message1", "throwable1"));
        helper.offer(new LogNotificationEvent(2000L, "WARN", "com.example.Bar", "message2", null));

        List<LogNotificationEvent> events = helper.drainAll();
        assertEquals(2, events.size());
        assertEquals("message1", events.get(0).getMessage());