Missing Method in ProductsController

You are seeing this error because the action special_deal is not defined in controller ProductsController

Notice: this error is being rendered by the app/views/errors/missing_action.thtml view file, a user-customizable error page for handling invalid action dispatches.

Fatal: Create Method:

<?php
    class ProductsController extends AppController
    {
        function special_deal()
        {

        }
    }
?>

in file : app/controllers/products_controller.php

Error: Unable to execute action special_deal in ProductsController