Complexe filter in a collection

Question

I would like to use addFieldToFilter (or other...) in a collection to make this filter :

(item1 = 'value' AND (item2 = 'value1' OR item = 'value2')) OR (item2 = 'value3' OR item = 'value4')

Answer 1

Whenever dealing with complex filters, I prefer to work with the underlying Zend_Db_Select object. For example:

$collection
    ->getSelect()
    ->where(
        new Zend_Db_Expr("(item1 = '?' AND (item2 = '?' OR item = '?')) OR (item2 = '?' OR item = '?')"), 
        'value1', 
        'value2', 
        'value3', 
        'value4'
    );