![editor support](https://fastapi.tiangolo.com/img/pycharm-completion.png)

你将能进行代码补全，这是在之前你可能曾认为不可能的事。例如，在来自请求 JSON 体（可能是嵌套的）中的键 `price`。

不会再输错键名，来回翻看文档，或者来回滚动寻找你最后使用的 `username` 或者 `user_name`。

### 简洁 { #short }

任何类型都有合理的**默认值**，任何和地方都有可选配置。所有的参数被微调，来满足你的需求，定义成你需要的 API。

但是默认情况下，一切都能**“顺利工作”**。

### 验证 { #validation }

* 校验大部分（甚至所有？）的 Python **数据类型**，包括：

Но вы не ограничены использованием какой-то конкретной модели данных, класса или типа.

Хотите, чтобы в модели были `id` и `email`, но не было `username`? Пожалуйста. Можно использовать те же инструменты.

Хотите просто `str`? Или просто `dict`? Или напрямую экземпляр класса модели базы данных? Всё работает одинаково.

    /**
     * The protocol scheme (http, https).
     */
    @Size(max = 10)
    public String protocolScheme;

    /**
     * The username for authentication.
     */
    @Required
    @Size(max = 100)
    public String username;

    /**
     * The password for authentication.
     */
    @Size(max = 100)
    public String password;

    /**

    /** The protocol scheme for file access (maximum 10 characters). */
    @Size(max = 10)
    public String protocolScheme;

    /** The username for file authentication (required, maximum 100 characters). */
    @Required
    @Size(max = 100)
    public String username;

    /** The password for file authentication (maximum 100 characters). */
    @Size(max = 100)
    public String password;

Nie wieder falsche Schlüsselnamen tippen, Hin und Herhüpfen zwischen der Dokumentation, Hoch- und Runterscrollen, um herauszufinden, ob es `username` oder `user_name` war.

### Kompakt { #short }

    private static final String DOMAIN = Config.getProperty("jcifs.smb1.smb.client.domain", null);
    private static final String USERNAME = Config.getProperty("jcifs.smb1.smb.client.username", null);
    private static final int CACHE_POLICY = Config.getInt("jcifs.smb1.netbios.cachePolicy", 60 * 10) * 60; /* 10 hours */

    static NbtAddress[] dc_list = null;

from fastapi import FastAPI, Form
from pydantic import BaseModel

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str


@app.post("/login/")
async def login(data: FormData = Form()):

from typing import Annotated

from fastapi import FastAPI, Form
from pydantic import BaseModel

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str


@app.post("/login/")
async def login(data: Annotated[FormData, Form()]):

// factory receiver.  This constructor will normalize the username, password
// and authzID via the SASLprep algorithm, as recommended by RFC-5802.  If
// SASLprep fails, the method returns an error.
func (x *XDGSCRAMClient) Begin(userName, password, authzID string) (err error) {
	x.Client, err = x.NewClient(userName, password, authzID)
	if err != nil {
		return err
	}

from typing import Annotated

from fastapi import FastAPI, Form
from pydantic import BaseModel

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str
    model_config = {"extra": "forbid"}


@app.post("/login/")
async def login(data: Annotated[FormData, Form()]):