이전 코드 예제로 돌아가서, **FastAPI**는 다음처럼 처리합니다:

* `GET` 및 `PUT` 요청에 `item_id`가 경로에 있는지 검증.
* `GET` 및 `PUT` 요청에 `item_id`가 `int` 타입인지 검증.
    * 그렇지 않다면 클라이언트는 유용하고 명확한 에러를 볼 수 있습니다.
* `GET` 요청에 `q`라는 선택적인 쿼리 매개변수가 검사(`http://127.0.0.1:8000/items/foo?q=somequery`처럼).
    * `q` 매개변수는 `= None`으로 선언되었기 때문에 선택사항입니다.
    * `None`이 없다면 필수사항입니다(`PUT`의 경우와 마찬가지로).
* `/items/{item_id}`으로의 `PUT` 요청은 본문을 JSON으로 읽음:
    * `name`을 필수 속성으로 갖고 `str` 형인지 검사.

    * Swagger UI.
    * ReDoc.

---

Wracając do poprzedniego przykładu, **FastAPI** :

* Potwierdzi, że w ścieżce jest `item_id` dla żądań `GET` i `PUT`.
* Potwierdzi, że `item_id` jest typu `int` dla żądań `GET` i `PUT`.
    * Jeżeli nie jest, odbiorca zobaczy przydatną, przejrzystą wiadomość z błędem.

    "baz": {"name": "Baz", "description": None, "price": 50.2, "tax": 10.5, "tags": []},
}


@app.get("/items/{item_id}", response_model=Item)
async def read_item(item_id: str):
    return items[item_id]


@app.put("/items/{item_id}", response_model=Item)
async def update_item(item_id: str, item: Item):
    update_item_encoded = jsonable_encoder(item)
    items[item_id] = update_item_encoded

Bir API oluştururken, "yol", "kaynaklar" ile "endişeleri" ayırmanın ana yöntemidir.

#### Operasyonlar

Burada "operasyon" HTTP "metodlarından" birini ifade eder.

Bunlardan biri:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...veya daha az kullanılan diğerleri:

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

            return null;
        })).status(Status.OK).result());
    }

    // PUT /api/admin/fileauth/setting
    @Execute
    public JsonResponse<ApiResult> put$setting(final CreateBody body) {
        validateApi(body, messages -> {});
        if (!isValidFileConfigId(body.fileConfigId)) {

from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None


@app.put("/items/{item_id}")
async def update_item(
    *,
    item_id: int,
    item: Annotated[
        Item,
        Body(
            openapi_examples={
                "normal": {

    * Swagger UI.
    * ReDoc.

---

Terugkomend op het vorige code voorbeeld, **FastAPI** zal:

* Valideren dat er een `item_id` bestaat in het pad voor `GET` en `PUT` verzoeken.
* Valideren dat het `item_id` van het type `int` is voor `GET` en `PUT` verzoeken.
    * Wanneer dat niet het geval is, krijgt de cliënt een nuttige, duidelijke foutmelding.

				Resource: SlashSeparator + bucketName + SlashSeparator,
				Code:     "InvalidAccessKeyId",
				Message:  "The Access Key Id you provided does not exist in our records.",
			},
			shouldPass: false,
		},
		// PUT empty credentials
		{
			method:             http.MethodPut,
			bucketName:         bucketName,
			accessKey:          "",
			secretKey:          "",
			expectedRespStatus: http.StatusForbidden,

                    return null;
                })).status(ApiResult.Status.OK).result());
    }

    // PUT /api/admin/dict/mapping/setting/{dictId}
    @Execute
    public JsonResponse<ApiResult> put$setting(final String dictId, final CreateBody body) {
        body.dictId = dictId;
        validateApi(body, messages -> {});
        body.crudMode = CrudMode.CREATE;

                    return null;
                })).status(ApiResult.Status.OK).result());
    }

    // PUT /api/admin/dict/stemmerOverride/setting/{dictId}
    @Execute
    public JsonResponse<ApiResult> put$setting(final String dictId, final CreateBody body) {
        body.dictId = dictId;
        validateApi(body, messages -> {});
        body.crudMode = CrudMode.CREATE;