I have the following:
$products = Mage::getModel(\'catalog/product\')
->getCollection()
->addAttributeToSort(\'id\', \'RAND()\')
->addAt
Magento collection do not accept parameters other then one of selected attribute. In this case you should get Zend_Db_Select
object and add order instruction to it.
$products = Mage::getModel('catalog/product')
->getCollection()
->addAttributeToSort()
->addAttributeToSelect('small_image')
->addCategoryFilter(Mage::getModel('catalog/category')->load());
$products->getSelect()->order(new Zend_Db_Expr('RAND()'));
To see what query will be executed you may use this construnction
$products->load(true, true); // first parameter show sql query in output, second show sql query in var/log/syslog