I have following error after my upgrade :

Fatal error: Call to undefined method Mage_Core_Model_Config::getResourceHelper() in /home/koala/dev/magento/koala/app/Mage.php on line 531 

I ve set up some debug here :

 * Retreive resource helper object
 * @param string $moduleName
 * @return Mage_Core_Model_Resource_Helper_Abstract
public static function getResourceHelper($moduleName)
    $registryKey = '_resource_helper/' . $moduleName;
    if (!self::registry($registryKey)) {
        $helperClass = self::getConfig()->getResourceHelper($moduleName);
        self::register($registryKey, $helperClass);

    return self::registry($registryKey);

And the resource helper called is :

string(21) "_resource_helper/core"

Does anyone had and fixed this issue?


  • Google helps stackoverflow.com/questions/28475293/… Commented Apr 18, 2017 at 11:53
  • Check getResourceHelper function in Mage.php Commented Apr 18, 2017 at 12:07
  • @PankajPareek sorry i edited my question, error is in fact in Mage.php call of app/code/core/Mage/Core/Model/Config.php file but I don't know what s going badly there
    – Nicolas D
    Commented Apr 18, 2017 at 12:44
  • I had a deeper look and all the calls to core getResourceHelper are made by magento from core folder, not a single thing is calling this in local so it is not due to custom developments
    – Nicolas D
    Commented Apr 18, 2017 at 13:31

1 Answer 1


I fixed this, we had in local an override on app/code/local/Mage/Core/Model/Config.php that was broken

  • This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From Review Commented Apr 18, 2017 at 16:08
  • In this override function was missing, so basically once added, it works
    – Nicolas D
    Commented Apr 19, 2017 at 13:19

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