* @return HTML response for the web authentication edit form
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse edit(final EditForm form) {
        validate(form, messages -> {}, this::asListHtml);
        final String id = form.id;
        webAuthenticationService.getWebAuthentication(id).ifPresent(entity -> {
            copyBeanToBean(entity, form, op -> {});

In diesem Fall möchten Sie möglicherweise dokumentieren, wie diese externe API aussehen *sollte*. Welche *Pfadoperation* sie haben sollte, welchen Body sie erwarten sollte, welche Response sie zurückgeben sollte, usw.

## Eine Anwendung mit Callbacks

Sehen wir uns das alles anhand eines Beispiels an.

package tests_test

import (
	"testing"

	"gorm.io/gorm"
	. "gorm.io/gorm/utils/tests"
)

func TestUpdateBelongsTo(t *testing.T) {
	user := *GetUser("update-belongs-to", Config{})

	if err := DB.Create(&user).Error; err != nil {
		t.Fatalf("errors happened when create: %v", err)
	}

	user.Company = Company{Name: "company-belongs-to-association"}
	user.Manager = &User{Name: "manager-belongs-to-association"}

                            <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"/>

                                    <div class="form-inline col-sm-9">
                                        <la:errors property="jobLogging"/>
                                        <div class="form-check">
                                            <la:checkbox styleId="jobLogging" styleClass="form-check-input" property="jobLogging"/>
                                            <label for="jobLogging" class="form-check-label">

///

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

Import `Form` from `fastapi`:

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

## Define `Form` parameters { #define-form-parameters }

Create form parameters the same way you would for `Body` or `Query`:

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

	Friends   []*User    `gorm:"many2many:user_friends;"`
	Active    bool
}

type Account struct {
	gorm.Model
	UserID sql.NullInt64
	Number string
}

type Pet struct {
	gorm.Model
	UserID *uint
	Name   string
	Toy    Toy `gorm:"polymorphic:Owner;"`
}

type Toy struct {
	gorm.Model
	Name      string
	OwnerID   string
	OwnerType string
}

type Tools struct {
	gorm.Model
	Name     string

        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

	TypeAlias struct {
		ID
		INT     `gorm:"column:fint"`
		INT8    `gorm:"column:fint8"`
		INT16   `gorm:"column:fint16"`
		INT32   `gorm:"column:fint32"`
		INT64   `gorm:"column:fint64"`
		UINT    `gorm:"column:fuint"`
		UINT8   `gorm:"column:fuint8"`
		UINT16  `gorm:"column:fuint16"`
		UINT32  `gorm:"column:fuint32"`
		UINT64  `gorm:"column:fuint64"`
		FLOAT32 `gorm:"column:ffloat32"`

                                        <la:text styleId="term" property="term" styleClass="form-control"/>
                                    </div>
                                </div>
                                <div class="form-group row">
                                    <label for="content" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.related_content_content"/></label>