app = FastAPI()


class Image(BaseModel):
    url: HttpUrl
    name: str


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: set[str] = set()
    image: Image | None = None


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

然後把它作為某個屬性的型別使用：

{* ../../docs_src/body_nested_models/tutorial004_py310.py hl[18] *}

這表示 **FastAPI** 會期望一個類似如下的本文：

```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"
    }
}
```

只需進行上述宣告，使用 **FastAPI** 你就能獲得：

- 編輯器支援（自動完成等），即使是巢狀模型

3. **A relationship, not a transaction.** We view community PRs as an important part of our relationship with the Gradle community. We hope contributors will learn from the review process, stay engaged, and continue helping us build Gradle.

## In summary

We welcome AI-assisted contributions from people who understand what they're submitting and are ready to collaborate on it.

from fastapi import Body, FastAPI
from pydantic import BaseModel

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()):

Örneğin, yukarıdaki model şu şekilde bir JSON "`object`" (veya Python `dict`) tanımlar:

```JSON
{
    "name": "Foo",
    "description": "An optional description",
    "price": 45.2,
    "tax": 3.5
}
```

...`description` ve `tax` opsiyonel olduğu için (default değerleri `None`), şu JSON "`object`" da geçerli olur:

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

from typing import Any

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: list[str] = []


@app.post("/items/", response_model=Item)
async def create_item(item: Item) -> Any:
    return item


@app.get("/items/", response_model=list[Item])

	if err != nil {
		return t, fmt.Errorf("Unable to get absolute path of %s. %w", path, err)
	}

	// Version is minio non-standard, we will use minio binary's
	// ModTime as release time.
	fi, err := Stat(absPath)
	if err != nil {
		return t, fmt.Errorf("Unable to get ModTime of %s. %w", absPath, err)
	}

	// Return the ModTime
	return fi.ModTime().UTC(), nil
}

}

// RawFileInfo - represents raw file stat information as byte array.
// The above means that any added/deleted fields are incompatible.
// Make sure to bump the internode version at storage-rest-common.go
type RawFileInfo struct {
	// Content of entire xl.meta (may contain data depending on what was requested by the caller.
	Buf []byte `msg:"b,allownil"`
}

// FileInfo - represents file stat information.

```Python hl_lines="3  5-6"
{
    "name": "Baz",
    "description": None,
    "price": 50.2,
    "tax": 10.5,
    "tags": []
}
```

dann ist FastAPI klug genug (tatsächlich ist Pydantic klug genug) zu erkennen, dass, obwohl `description`, `tax`, und `tags` die gleichen Werte haben wie ihre Defaultwerte, sie explizit gesetzt wurden (statt dass sie von den Defaultwerten genommen wurden).

[**X (Twitter)** üzerinde @fastapi hesabını takip edin](https://x.com/fastapi) ve **FastAPI** ile ilgili en güncel haberleri alın. 🐦

## GitHub'da **FastAPI**'ye yıldız verin { #star-fastapi-in-github }

GitHub'da FastAPI'ye "star" verebilirsiniz (sağ üstteki yıldız butonuna tıklayarak): [https://github.com/fastapi/fastapi](https://github.com/fastapi/fastapi). ⭐️