Magento addFieldToFilter: Two fields, match as OR, not AND

Question

I\'ve been stuck on this for the last few hours. I got it working by hacking a few lines in /lib/Varien/Data/Collection/Db.php, but I\'d rather use the proper s

Answer 1

public function testAction()
{
        $filter_a = array('like'=>'a%');
        $filter_b = array('like'=>'b%');
        echo(
        (string) 
        Mage::getModel('catalog/product')
        ->getCollection()
        ->addFieldToFilter('sku',array($filter_a,$filter_b))
        ->getSelect()
        );
}

Result:

WHERE (((e.sku like 'a%') or (e.sku like 'b%')))

Source: http://alanstorm.com/magento_collections