Quick Question - DB - Active Record and NULL values

[eluser]MEM[/eluser]
Hello,


I had this working:

Code:

$query=$this->db->get_where('category', array('parent_id_cat'=>NULL));

I wanted to add more where clauses on it:

Code:

$this->db->where('activa_cat =', 1);
$this->db->where('parent_id_cat =', NULL);

But this last line gives me an error. He is not accepting the NULL param.


What am I doing wrong?


Regards,
Márcio