I have this error appers all the time in the system.log file. How to fix it?

ERR (3): Notice: Undefined variable: id  in /ext/vhosts/mysite.com/public/app/code/core/Mage/Core/Model/Abstract.php on line 224
ERR (3): Notice: Undefined variable: id  in /ext/vhosts/mysite.com/public/app/code/core/Mage/Core/Model/Abstract.php on line 225

I'm using Magento


Notice errors aren't critical, but it's better fixing them. However, Magento shouldn't display throw notice errors, so I suspect it could be coming from a custom module/theme.

To debug this (in a dev environment only): open up app/code/core/Mage/Core/Model/Abstract.php and add:

public function load($id, $field=null)
    if (!isset($id)) {
        echo Varien_Debug::backtrace(true, true);
    $this->_beforeLoad($id, $field);

Then refresh the page, and you should see a backtrace of the error, and by going up the backtrace, you can see what module/theme tries to load an object with an NULL id.

  • Can you explain what you mean by 'backtrace of the error'? – jscar Jul 7 '17 at 14:26
  • 1
    A backtrace is like a detailed path of a PHP process. So you can see exactly what executed what, where from and in what order – Mayers Jul 7 '17 at 14:33
  • Where can that information be found? Exception.log? – jscar Jul 7 '17 at 14:41
  • 1
    No, if you make the edit I have added above, it will be printed on the screen when you refresh – Mayers Jul 7 '17 at 14:43

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