Magento: Combine eq and is null in addAttributeToFilter

Question

I want to combine with OR \"is null\" and \"eq\" => array()

$collection->addAttributeToFilter(\'attributename\', array(\'is\' => null));
$collection->ad         


        

Answer 1

To use addAttributeToFilter with an OR condition and with left join you can do something like that:

$collection->addAttributeToFilter(
    array(
        array('attribute' => 'name_of_attribute_1','null' => 'this_value_doesnt_matter'),
        array('attribute' => 'name_of_attribute_2','in' => array(115, 116))
        )
     '',
    'left'
);