cakephp-tools/Config/Schema/key_value.php

<?php
class KeyValueSchema extends CakeSchema {

	public function before($event = array()) {
		return true;
	}

	public function after($event = array()) {
	}

	public $keyValues = array(
		'id' => array('type' => 'integer', 'null' => false, 'default' => null, 'length' => 10, 'key' => 'primary'),
		'foreign_id' => array('type' => 'string', 'null' => false, 'default' => null, 'length' => 36, 'key' => 'index', 'collate' => 'utf8_unicode_ci', 'charset' => 'utf8'),
		'model' => array('type' => 'string', 'null' => false, 'default' => null, 'length' => 30, 'collate' => 'utf8_unicode_ci', 'charset' => 'utf8'),
		'key' => array('type' => 'string', 'null' => false, 'default' => null, 'length' => 30, 'collate' => 'utf8_unicode_ci', 'charset' => 'utf8'),
		'value' => array('type' => 'string', 'null' => false, 'default' => null, 'collate' => 'utf8_unicode_ci', 'comment' => 'option setting', 'charset' => 'utf8'),
		'created' => array('type' => 'datetime', 'null' => false, 'default' => null),
		'modified' => array('type' => 'datetime', 'null' => false, 'default' => null),
		'indexes' => array(
			'PRIMARY' => array('column' => 'id', 'unique' => 1),
			'foreign_id' => array('column' => 'foreign_id', 'unique' => 0)
		),
		'tableParameters' => array('charset' => 'utf8', 'collate' => 'utf8_unicode_ci', 'engine' => 'MyISAM')
	);
}