在使用tagfield模块时，如何在Silverstripe中按标签过滤？

use SilverStripe\Forms\FieldList;
use SilverStripe\Forms\TextField;
use SilverStripe\TagField\TagField;

class MyDataObject extends DataObject
{
    private static $db = [
        'Title' => 'Varchar',
        'Tags' => 'TagField', // 使用tagfield模块创建标签字段
    ];

    private static $has_many = [
        'TaggedItems' => Tag::class,
    ];

    public function getCMSFields()
    {
        $fields = parent::getCMSFields();
        $fields->addFieldToTab('Root.Main', new TagField('Tags'));
        return $fields;
    }
}

<form action="/search" method="get">
    <input type="text" name="tag" placeholder="输入标签进行搜索">
    <button type="submit">搜索</button>
</form>

use SilverStripe\Control\Controller;
use SilverStripe\Control\HTTPRequest;

class SearchController extends Controller
{
    public function search(HTTPRequest $request)
    {
        $tag = $request->param('tag');
        $results = MyDataObject::get()->filter('Tags.Name', $tag);
        return $this->customise(['Results' => $results])->renderWith('SearchResults');
    }
}

<% if Results %>
<ul>
    <% loop Results %>
    <li><a href="$Link">$Title</a></li>
    <% end_loop %>
</ul>
<% else %>
<p>没有找到与标签“$Tag”相关的内容。</p>
<% end_if %>