depende - Code Search

docs_src/dependencies/tutorial008c_an_py39.py

from typing import Annotated

from fastapi import Depends, FastAPI, HTTPException

app = FastAPI()


class InternalError(Exception):
    pass


def get_username():
    try:
        yield "Rick"
    except InternalError:
        print("Oops, we didn't raise again, Britney 😱")


@app.get("/items/{item_id}")
def get_item(item_id: str, username: Annotated[str, Depends(get_username)]):
    if item_id == "portal-gun":

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github.com/tiangolo/fastapi

docs_src/background_tasks/tutorial002_an.py

from typing import Union

from fastapi import BackgroundTasks, Depends, FastAPI
from typing_extensions import Annotated

app = FastAPI()


def write_log(message: str):
    with open("log.txt", mode="a") as log:
        log.write(message)


def get_query(background_tasks: BackgroundTasks, q: Union[str, None] = None):
    if q:
        message = f"found query: {q}\n"
        background_tasks.add_task(write_log, message)
    return q

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github.com/tiangolo/fastapi

tests/test_security_api_key_header_optional.py

from typing import Optional

from fastapi import Depends, FastAPI, Security
from fastapi.security import APIKeyHeader
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()

api_key = APIKeyHeader(name="key", auto_error=False)


class User(BaseModel):
    username: str


def get_current_user(oauth_header: Optional[str] = Security(api_key)):
    if oauth_header is None:
        return None

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github.com/tiangolo/fastapi

docs/zh/docs/tutorial/dependencies/index.md

然后，依赖项函数返回包含这些值的 `dict`。

### 导入 `Depends`

```Python hl_lines="3"
{!../../docs_src/dependencies/tutorial001.py!}
```

### 声明依赖项

与在*路径操作函数*参数中使用 `Body`、`Query` 的方式相同，声明依赖项需要使用 `Depends` 和一个新的参数：

```Python hl_lines="15  20"
{!../../docs_src/dependencies/tutorial001.py!}
```

虽然，在路径操作函数的参数中使用 `Depends` 的方式与 `Body`、`Query` 相同，但 `Depends` 的工作方式略有不同。

这里只能传给 Depends 一个参数。

且该参数必须是可调用对象，比如函数。

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github.com/tiangolo/fastapi

docs/de/docs/tutorial/security/get-current-user.md

///

```Python hl_lines="19-22  26-27"
{!> ../../docs_src/security/tutorial002.py!}
```

////

## Den aktuellen Benutzer einfügen

Und jetzt können wir wiederum `Depends` mit unserem `get_current_user` in der *Pfadoperation* verwenden:

//// tab | Python 3.10+

```Python hl_lines="31"
{!> ../../docs_src/security/tutorial002_an_py310.py!}
```

////

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github.com/tiangolo/fastapi

docs/ko/docs/tutorial/security/get-current-user.md

/// tip | "팁"

요청 본문도 Pydantic 모델로 선언된다는 것을 기억할 것입니다.

여기서 **FastAPI**는 `Depends`를 사용하고 있기 때문에 혼동되지 않습니다.

///

/// check | "확인"

이 의존성 시스템이 설계된 방식은 모두 `User` 모델을 반환하는 다양한 의존성(다른 "의존적인")을 가질 수 있도록 합니다.

해당 타입의 데이터를 반환할 수 있는 의존성이 하나만 있는 것으로 제한되지 않습니다.

///

## 다른 모델

이제 *경로 작동 함수*에서 현재 사용자를 직접 가져올 수 있으며 `Depends`를 사용하여 **의존성 주입** 수준에서 보안 메커니즘을 처리할 수 있습니다.

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github.com/tiangolo/fastapi

docs/em/docs/tutorial/security/get-current-user.md

👆 5️⃣📆 💭 👈 📨 💪 📣 ⏮️ Pydantic 🏷.

📥 **FastAPI** 🏆 🚫 🤚 😨 ↩️ 👆 ⚙️ `Depends`.

///

/// check

🌌 👉 🔗 ⚙️ 🏗 ✔ 👥 ✔️ 🎏 🔗 (🎏 "☑") 👈 🌐 📨 `User` 🏷.

👥 🚫 🚫 ✔️ 🕴 1️⃣ 🔗 👈 💪 📨 👈 🆎 💽.

///

## 🎏 🏷

👆 💪 🔜 🤚 ⏮️ 👩‍💻 🔗 *➡ 🛠️ 🔢* &amp; 🙅 ⏮️ 💂‍♂ 🛠️ **🔗 💉** 🎚, ⚙️ `Depends`.

&amp; 👆 💪 ⚙️ 🙆 🏷 ⚖️ 💽 💂‍♂ 📄 (👉 💼, Pydantic 🏷 `User`).

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github.com/tiangolo/fastapi

tests/test_security_oauth2_optional.py

        return None
    user = User(username=oauth_header)
    return user


@app.post("/login")
def login(form_data: OAuth2PasswordRequestFormStrict = Depends()):
    return form_data


@app.get("/users/me")
def read_users_me(current_user: Optional[User] = Depends(get_current_user)):
    if current_user is None:
        return {"msg": "Create an account first"}
    return current_user


client = TestClient(app)

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github.com/tiangolo/fastapi

docs_src/websockets/tutorial002_an_py310.py

from typing import Annotated

from fastapi import (
    Cookie,
    Depends,
    FastAPI,
    Query,
    WebSocket,
    WebSocketException,
    status,
)
from fastapi.responses import HTMLResponse

app = FastAPI()

html = """
<!DOCTYPE html>
<html>
    <head>
        <title>Chat</title>
    </head>
    <body>
        <h1>WebSocket Chat</h1>
        <form action="" onsubmit="sendMessage(event)">

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github.com/tiangolo/fastapi

docs_src/websockets/tutorial002_py310.py

from fastapi import (
    Cookie,
    Depends,
    FastAPI,
    Query,
    WebSocket,
    WebSocketException,
    status,
)
from fastapi.responses import HTMLResponse

app = FastAPI()

html = """
<!DOCTYPE html>
<html>
    <head>
        <title>Chat</title>
    </head>
    <body>
        <h1>WebSocket Chat</h1>
        <form action="" onsubmit="sendMessage(event)">

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