silverstripe-frameworktest/code/linkfield/Extensions/ElementContentExtension.php

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<?php
namespace SilverStripe\FrameworkTest\LinkField\Extensions;
use SilverStripe\Core\Extension;
use SilverStripe\LinkField\Form\LinkField;
use SilverStripe\LinkField\Form\MultiLinkField;
use SilverStripe\LinkField\Models\Link;
use SilverStripe\LinkField\Models\EmailLink;
use SilverStripe\LinkField\Models\PhoneLink;
use SilverStripe\LinkField\Models\SiteTreeLink;
class ElementContentExtension extends Extension
{
private static bool $inline_editable = true;
private static array $has_one = [
'OneLink' => Link::class,
];
private static $has_many = [
'ManyLinks' => Link::class . '.Owner',
];
private static array $owns = [
'OneLink',
'ManyLinks',
];
private static array $cascade_deletes = [
'OneLink',
'ManyLinks',
];
private static array $cascade_duplicates = [
'OneLink',
'ManyLinks',
];
public function updateCMSFields($fields)
{
$fields->removeByName(['OneLinkID', 'ManyLinks']);
$fields->addFieldsToTab(
'Root.Main',
[
LinkField::create('OneLink')
->setAllowedTypes([
SiteTreeLink::class,
EmailLink::class,
PhoneLink::class
]),
MultiLinkField::create('ManyLinks'),
],
);
}
}