app = FastAPI()


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


class User(BaseModel):
    username: str
    full_name: str | None = None


@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item, user: User, importance: int = Body()):
    results = {"item_id": item_id, "item": item, "user": user, "importance": importance}

from fastapi.sse import EventSourceResponse
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float


@app.get("/items/stream", response_class=EventSourceResponse)
async def stream_items() -> AsyncIterable[Item]:
    yield Item(name="Plumbus", price=32.99)
    yield Item(name="Portal Gun", price=999.99)
```

            "paths": {
                "/items/{item_id}": {
                    "get": {
                        "responses": {
                            "404": {"description": "Item not found"},
                            "302": {"description": "The item was moved"},
                            "403": {"description": "Not enough privileges"},
                            "200": {

        return input;
    }

    /**
     * Checks if the item has been updated.
     *
     * @return true if the item has been updated, false otherwise.
     */
    public boolean isUpdated() {
        return newInput != null;
    }

    /**
     * Checks if the item has been marked for deletion.
     *
     * @return true if the item is marked for deletion, false otherwise.
     */

constraints.URL.message = {item} non è un URL valido.
constraints.Required.message = {item} è richiesto.
constraints.TypeInteger.message = {item} deve essere un numero.
constraints.TypeLong.message = {item} deve essere un numero.
constraints.TypeFloat.message = {item} deve essere un numero.
constraints.TypeDouble.message = {item} deve essere un numero.
constraints.TypeAny.message = {item} non può essere convertito in {propertyType}.

        }

        for (final SuggestItem item : mergedItems) {
            final GetResponse getResponse = client.prepareGet().setIndex(index).setId(item.getId()).get(settings.getIndexTimeout());
            if (update && getResponse.isExists()) {
                final IndexRequestBuilder indexRequestBuilder = new IndexRequestBuilder(client, IndexAction.INSTANCE, index);
                indexRequestBuilder.setId(item.getId())

     * Retrieves a specific character mapping item by its ID from the specified dictionary.
     * <p>
     * This method looks up a character mapping item using its unique identifier
     * within the context of the specified dictionary.
     * </p>
     *
     * @param dictId the dictionary ID containing the character mapping item
     * @param id the unique identifier of the character mapping item

///

## 단일 본문 매개변수 삽입하기 { #embed-a-single-body-parameter }

Pydantic 모델 `Item`에서 가져온 단일 `item` 본문 매개변수만 있다고 하겠습니다.

기본적으로 **FastAPI**는 그 본문을 직접 예상합니다.

하지만 추가 본문 매개변수를 선언할 때처럼, `item` 키를 가지고 그 안에 모델 내용이 들어 있는 JSON을 예상하게 하려면, `Body`의 특별한 매개변수 `embed`를 사용할 수 있습니다:

```Python
item: Item = Body(embed=True)
```

다음과 같이요:

///

## 嵌入单个请求体参数 { #embed-a-single-body-parameter }

假设你只有一个来自 Pydantic 模型 `Item` 的请求体参数 `item`。

默认情况下，**FastAPI** 将直接期望这样的请求体。

但是，如果你希望它期望一个拥有 `item` 键并在值中包含模型内容的 JSON，就像在声明额外的请求体参数时所做的那样，则可以使用一个特殊的 `Body` 参数 `embed`：

```Python
item: Item = Body(embed=True)
```

比如：

{* ../../docs_src/body_multiple_params/tutorial005_an_py310.py hl[17] *}

        charMappingFile.insert(newItem);

        // Verify the item was added
        PagingList<CharMappingItem> result = charMappingFile.selectList(0, 10);
        assertEquals(2, result.size());

        // Check if new item exists
        boolean found = false;
        for (CharMappingItem item : result) {
            if (item.getOutput().equals("z")) {