Magento - add media gallery attribute to product flat table

Question

How do I add a \'media_gallery\" attribute type to products flat table, so that it can be used in product listing?

Answer 1

To change it programmatically, you could do.

$setup = new Mage_Eav_Model_Entity_Setup('core_setup');
$setup->updateAttribute('catalog_product', '{field_code_here}', 'used_in_product_listing', 1);

Then reindex.