gistfile1.aw

<?php

// First off, change
public function __construct($table, $id) ..

// to
public function __construct($table, $id = null) ..

// then only use the $id part if its not null

public static function create($table, array $properties) {

	$x = new self($table);
	foreach($properties as $k => $v) {
		
		$x->{$k} = $v;
	}

	return $x;
}