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)
```

        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.
     */

												<la:message key="labels.profile" />
											</la:link>
										</c:if>
										<c:if test="${adminUser == true}">
											<la:link href="/admin" styleClass="dropdown-item">
												<la:message key="labels.administration" />
											</la:link>
										</c:if>
										<la:link href="/logout/" styleClass="dropdown-item">
											<la:message key="labels.logout" />

												<la:message key="labels.profile" />
											</la:link>
										</c:if>
										<c:if test="${adminUser == true}">
											<la:link href="/admin" styleClass="dropdown-item">
												<la:message key="labels.administration" />
											</la:link>
										</c:if>
										<la:link href="/logout/" styleClass="dropdown-item">
											<la:message key="labels.logout" />

///

## 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] *}

            "description": "A very nice Item",
            "price": 35.4,
            "tax": 3.2,
            "tags": ["foo", "bar", "foo"],
        },
    )
    assert response.status_code == 200, response.text
    assert response.json() == {
        "item_id": 123,
        "item": {
            "name": "Foo",
            "description": "A very nice Item",
            "price": 35.4,
            "tax": 3.2,

from fastapi import FastAPI
from fastapi.responses import JSONResponse
from pydantic import BaseModel


class Item(BaseModel):
    id: str
    value: str


class Message(BaseModel):
    message: str


app = FastAPI()


@app.get("/items/{item_id}", response_model=Item, responses={404: {"model": Message}})
async def read_item(item_id: str):
    if item_id == "foo":

from pydantic import BaseModel

app = FastAPI()


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


class ResponseMessage(BaseModel):
    message: str


class User(BaseModel):
    username: str
    email: str


@app.post("/items/", response_model=ResponseMessage, tags=["items"])
async def create_item(item: Item):
    return {"message": "Item received"}

from pydantic import BaseModel


class Item(BaseModel):
    id: str
    value: str


class Message(BaseModel):
    message: str


app = FastAPI()


@app.get(
    "/items/{item_id}",
    response_model=Item,
    responses={
        404: {"model": Message, "description": "The item was not found"},
        200: {
            "description": "Item requested by ID",
            "content": {

$env:JAVA_TOOL_OPTIONS=''

$ErrorActionPreference="Stop"
$gradleInit = "C:\Users\$env:username\.gradle\init.d\"
echo "Remove $gradleInit"
Remove-Item -Recurse -Force $gradleInit -ErrorAction Ignore
New-Item -ItemType directory -Path $gradleInit
echo "Copy .ci/init.gradle to $gradleInit"
Copy-Item .ci/init.gradle -Destination $gradleInit

[Environment]::SetEnvironmentVariable("JAVA_HOME", $null, "Machine")