How to specify null value as filter in a Doctrine query?

Question

I am using Doctrine 1.1 in Zend. I am trying to write a query that will return records that have a null value in a certain column.

    $q = Doctrine_Query::creat         


        

Answer 1

If you are using Symfony 2 and above, you can use this code:

->where($qb->expr()->isNull('a.vertical_id'));

Reference:
http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/query-builder.html#the-expr-class