gistfile1.php

<?php
App::uses('AppController', 'Controller');
 
class CountriesController extends AppController {
         
    public $helpers = array('Js');
    
    public function select() {
        $countries = $this->Country->find('list');
        $states = array();
        foreach ($countries as $country_id => $name) {
            $states = $this->Country->State->findByCountryId($country_id);
            break;
        }
        
        $this->set(compact('countries', 'states'));
    }
    
 
    public function states_list() {
        $this->request->onlyAllow('ajax');
        $id = $this->request->query('id');
        if (!$id) {
            throw new NotFoundException();
        }
 
        $states = $this->Country->State->find('list', array(
            'conditions' => array('country_id' => $id)
        ));
 
        $this->set(compact('states'));
    }
}