Article.php

<?php
class Article extends DataObject {
	private static $db = array(
		'Heading' => 'Varchar',
		'CreateDate' => 'SS_Datetime',
		'Author' => 'Varchar',
		'Content' => 'HTMLText'
	);
	private static $has_one = array(
		'ArticleAH' => 'ArticleHolder.Article'
	);
	private static $belong_many_many = array(
		'ArticleLP' => 'LandingPage.Article'
	);
	public static $summary_fields = array(
		'Heading' => 'Heading',
		'CreateDate' => 'Date',
		'Author' => 'Author'
	);
	public static $default_sort = "CreateDate ASC";
	private static $searchable_fields = array(
		'Heading' => 'PartialMatchFilter'
	);
	public static $field_labels = array(
		'Article' => 'Holder'
	);
	public function getCMSFields() {
		$fields = parent::getCMSFields();
		$fields->dataFieldByName('CreateDate')->getDateField()->setConfig('showcalendar', true);
		$fields->dataFieldByName('CreateDate')->getTimeField()->setConfig('use_strtotime', true);
		$fields->dataFieldByName('CreateDate')->getTimeField()->setValue('now');
		return $fields;
    }
	public function onBeforeWrite() {

	}
}