Magento

Need to get username using user_id from admin grid.

$this->addColumn(’user_id’, array(
‘header’ => Mage::helper(’affiliate’)->__(’Name’),
‘align’ =>’left’,
‘index’ => ‘user_id’,
));

Please help.

In which grid exactly do you want to add this column? When you have the user_id in this column but want the name, you have to add a own renderer which gets the id and returns the name.

example: http://inchoo.net/ecommerce/magento/how-to-add-custom-renderer-for-a-custom-column-in-magento-grid/