I have insert column: warehouse in sales_flat_order_grid.[And also created attributes with values] After added how can i get the attributes values,
//workout
$this->addColumn('warehouse', array(
'header' => Mage::helper('sales')->__('Warehouse'),
'index' => 'warehouse',
'type' => 'options',
'width' => '70px',
'options' => Mage::getSingleton('eav/config')->getAttribute('catalog_product', 'warehouse'),
));
How to solve the error?