Active record complex where statement troubles

[eluser]champs[/eluser]

Code:

$this->db->select('john_field, bert_field, harry_field');
$this->db->from('chum_table');
$this->db->where("(john_field = 'test1' OR john_field = 'test2')");
$this->db->where("(bert_field = test3 OR bert_field = test4)");
$this->db->where("(harry_field = 'test5' OR harry_field = 'test6')");

In this case, you should also run $this->db->escape_str() on any input variables.