Magento set product list order by attribute values

Question

I am trying to provide the custom attribute in sort-by, when am trying to fetching the products list order by custom attribute those are not in Ascending order.

  if ($attribute == 'paidship') {
        //$dir = 'ASC';
        if (isset($this->_joinFields[$attribute])) {

            $this->getSelect()->order($this->_getAttributeFieldName($attribute) . ' ' . $dir,'e.name'.$dir);

        }
    }

My custom attribute is "paidship", i want fetch them in first in Ascending order and remaining products should display after those products and those are also be in Ascending order

Answer 1

You can add custom attribute to sort the collection as follows:

$collection->addAttributeToSort('paidship','ASC');