我可以在Silverstripe中管理与Gridfield (或类似的)的has_one关系吗？

class Book extends DataObject {
    private static $db = array(
        'Title' => 'Varchar',
    );

    private static $has_one = array(
        'Author' => 'Author',
    );
}

class Author extends DataObject {
    private static $db = array(
        'Name' => 'Varchar',
    );
}

class BookAdmin extends ModelAdmin {
    private static $managed_models = array(
        'Book',
    );

    public function getEditForm($id = null, $fields = null) {
        $form = parent::getEditForm($id, $fields);

        if ($this->modelClass == 'Book') {
            $gridField = $form->Fields()->fieldByName($this->sanitiseClassName($this->modelClass));
            $config = $gridField->getConfig();
            $config->addComponent(new GridFieldRelationEditor());
        }

        return $form;
    }
}