}


@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

    response = client.get("/items/recursive")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "sub_items": [{"name": "subitem", "sub_items": []}],
        "name": "item",
    }

    response = client.get("/items/recursive-submodel")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "name": "item",
        "sub_items1": [
            {

from fastapi import FastAPI
from pydantic import BaseModel


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


app = FastAPI()


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item, q: Union[str, None] = None):
    result = {"item_id": item_id, **item.model_dump()}
    if q:
        result.update({"q": q})

    """
    Pass items or `DefaultPlaceholder`s by descending priority.

    The first one to _not_ be a `DefaultPlaceholder` will be returned.

    Otherwise, the first item (a `DefaultPlaceholder`) will be returned.
    """
    items = (first_item,) + extra_items
    for item in items:
        if not isinstance(item, DefaultPlaceholder):
            return item

                        },
                    },
                    "summary": "Update Item",
                },
            },
        },
        "components": {
            "schemas": {
                "HTTPValidationError": {
                    "properties": {
                        "detail": {
                            "items": {
                                "$ref": "#/components/schemas/ValidationError",

    return JSONResponse(
        status_code=422,
        content=jsonable_encoder({"detail": exc.errors(), "body": exc.body}),
    )


class Item(BaseModel):
    title: str
    size: int


@app.post("/items/")
async def create_item(item: Item):

                            }
                        },
                        "required": True,
                    },
                },
            }
        },
        "components": {
            "schemas": {
                "Item": {
                    "type": "object",
                    "title": "Item",
                    "properties": {

                                        <td><c:forEach var="item"
                                                       items="${protocolSchemeItems}">
                                            <c:if test="${protocolScheme==item.value}">${f:h(item.label)}</c:if>
                                        </c:forEach> <la:hidden property="protocolScheme"/></td>

            },
            "/items/{item_id}": {
                "get": {
                    "tags": ["items"],
                    "summary": "Read Item",
                    "operationId": "read_item_items__item_id__get",
                    "parameters": [
                        {
                            "required": True,
                            "schema": {"title": "Item Id", "type": "string"},

Tarayıcımızda şu bağlantıyı açalım <a href="http://127.0.0.1:8000/items/5?q=somequery" class="external-link" target="_blank">http://127.0.0.1:8000/items/5?q=somequery</a>.

Aşağıdaki gibi bir JSON yanıtıyla karşılaşacağız:

```JSON
{"item_id": 5, "q": "somequery"}
```

Az önce oluşturduğumuz API:

* `/` ve `/items/{item_id}` <abbr title="Adres / Yol: Path ">_yollarına_</abbr> HTTP isteği alabilir.