CakePHP: exemplo do useTable ( http://www.tuliofaria.net/dica-pluralizacao-no-model-do-cakephp-sem-criar-novas-regras/ )

Extensao.php

<?php
  class Extensao extends AppModel{
    public $useTable = "extensoes";
  }

ExtensoesController.php

<?php
  class ExtensoesController extends AppController{
    public $uses = array("Extensao");
  }