如何从magento中的控制器内的模型访问公共函数？

Question

\ This is a magento issue. I have this controller called ImagesController.php where

class My_Sell_ImagesController extends Mage_Core_Controller_Front_Action

I am extending/inhering core controller

Now, I have this another class

class My_Advert_Model_Advert extends Mage_Core_Model_Abstract {

public function isValid($arrStepTpCheck){
...

I will like to access isValid inside My_Sell_ImagesController maybe something like

 $advert = Mage::registry('current_advert');

$arrError = $this->isValid(array('step1'));

But this gives me

Fatal error: Call to undefined method My_Sell_ImagesController::isValid() in .....ImagesController.php

I am new to Magento backend. So please help?

Answer 1

try this code

Mage::getModel('advert/advert')->isValid(array('step1'));

or

My_Advert_Model_Advert::isValid(array('step1'));