<?php namespace SilverStripe\Forms\Tests\FormScaffolderTest; use SilverStripe\Dev\TestOnly; use SilverStripe\Forms\FieldList; use SilverStripe\Forms\TextField; use SilverStripe\ORM\DataExtension; class ArticleExtension extends DataExtension implements TestOnly { private static $db = array( 'ExtendedField' => 'Varchar' ); public function updateCMSFields(FieldList $fields) { $fields->addFieldToTab( 'Root.Main', new TextField('AddedExtensionField') ); } }