*
     * @param form the login form containing username and password
     * @return the HTML response after login attempt
     */
    @Execute
    public HtmlResponse login(final LoginForm form) {
        validate(form, messages -> {}, () -> asIndexPage(form));
        verifyToken(() -> asIndexPage(form));
        final String username = form.username;
        final String password = form.password;

                                    </div>
                                </div>
                                <c:if test="${crudMode==2}">
                                    <div class="form-group row">
                                        <label class="col-sm-3 text-sm-right col-form-label"><la:message

    }

    /**
     * Deletes the specified plugin.
     *
     * @param form the delete form containing plugin information
     * @return HTML response redirecting to the plugin list
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse delete(final DeleteForm form) {
        validate(form, messages -> {}, () -> asHtml(path_AdminPlugin_AdminPluginJsp));

```

///

## Importar `Form` { #import-form }

Importar `Form` desde `fastapi`:

{* ../../docs_src/request_forms/tutorial001_an_py39.py hl[3] *}

## Definir parámetros de `Form` { #define-form-parameters }

Crea parámetros de formulario de la misma manera que lo harías para `Body` o `Query`:

{* ../../docs_src/request_forms/tutorial001_an_py39.py hl[9] *}

                            <div class="card-body">
                                <div class="form-group row">
                                    <span class="font-weight-bold col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.replace_aliases"/></span>
                                    <div class="form-inline col-sm-9">
                                        <la:errors property="replaceAliases"/>

        validate(form, messages -> {}, () -> asEditTagsHtml(form.path, form.name));
        saveToken();
        return asEditTagsHtml(form.path, form.name);
    }

    /**
     * Updates the tags for a storage object.
     *
     * @param form the tag form containing updated tag information
     * @return HTML response redirecting to the storage list after update
     */
    @Execute

                                                 styleClass="form-control"/>
                                    </div>
                                </div>
                                <div class="form-group row">
                                    <label for="reading" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.elevate_word_reading"/></label>

```console
$ pip install python-multipart
```

///

## Импорт `Form` { #import-form }

Импортируйте `Form` из `fastapi`:

{* ../../docs_src/request_forms/tutorial001_an_py39.py hl[3] *}

## Определение параметров `Form` { #define-form-parameters }

Создайте параметры формы так же, как это делается для `Body` или `Query`:

{* ../../docs_src/request_forms/tutorial001_an_py39.py hl[9] *}

from fastapi import FastAPI, Form
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class UserForm(BaseModel):
    name: str
    email: str


class CompanyForm(BaseModel):
    company_name: str
    industry: str


@app.post("/form-union/")
def post_union_form(data: Annotated[Union[UserForm, CompanyForm], Form()]):
    return {"received": data}

# 表单数据

接收的不是 JSON，而是表单字段时，要使用 `Form`。

/// info | 说明

要使用表单，需预先安装 <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>。

例如，`pip install python-multipart`。

///

## 导入 `Form`

从 `fastapi` 导入 `Form`：

{* ../../docs_src/request_forms/tutorial001.py hl[1] *}

## 定义 `Form` 参数

创建表单（`Form`）参数的方式与 `Body` 和 `Query` 一样：