Scenario I'm overriding a grid and in the _prepareColumns() I would like to replace a column renderer with custom one.

Because the column already exist I'm using getColumn() and the setRenderer() method, the issue is that this action is breaking the backend page.

I cannot find any exception/report/log ... so I'm a bit lost.

here the code

 protected function _prepareColumns()

        return $this;
  • Are you sure the column is named in_products? Try dumping the value of $this->getColumn('in_products') to see whether you're attempting to call ->setRenderer() on a non-object. Commented Aug 7, 2014 at 17:14
  • in_product is right, xdebug ..
    – Fra
    Commented Aug 7, 2014 at 17:48
  • 1
    Is the path to the custom renderer is correct?
    – Amasty
    Commented Aug 7, 2014 at 18:56
  • yes it is correct
    – Fra
    Commented Aug 8, 2014 at 11:22

1 Answer 1


Late answer but maybe useful for someone

i have used setData('renderer', '...') instead of setRenderer('...')

this is from observer


and Denied.php

class MyName_MyModule_Block_Adminhtml_Grid_Renderer_Denied extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract
    public function render(Varien_Object $row)
        return 'some html here';

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