Rewriting adminhtml block

Question

I'm attempting to rewrite protected function _prepareColumns() in Mage_Adminhtml_Block_Catalog_Product_Grid

I have created the class MyCompany_Overrides_Block_Adminhtml_Catalog_Product_Grid, extending Mage_Adminhtml_Block_Catalog_Product_Grid, with the following in the config.xml:

<global>
    <blocks>
         <catalog>
            <rewrite>
                <product_grid>MyCompany_Overrides_Block_Adminhtml_Catalog_Product_Grid</product_grid>
            </rewrite>
        </catalog>
    </blocks>
</global>

However, the rewrite function is not being hit, but instead the original function is hit.

Could anyone point out any obvious flaws in the setup?

Answer 1

It's because you're not using the right namespace, it should be adminhtml instead of catalog

<global>
    <blocks>
         <adminhtml>
            <rewrite>
                <catalog_product_grid>MyCompany_Overrides_Block_Adminhtml_Catalog_Product_Grid</catalog_product_grid>
            </rewrite>
        </adminhtml>
    </blocks>
</global>