Codeigniter model with multiple update conditions using manual where statement

I have this code in model that returns data

$this->db->select('title, content, date');

$where = "name='Joe' AND status='boss'";

$this->db->where($where);

$query = $this->db->get('mytable');

return $query->result();

I am using a manual where and i wanted to know whether the concept of manual where in updates and possibly in deletes is allowed.

This code updates a table based on a single where condition

$data = array(
               'title' => $title,
               'name' => $name,
               'date' => $date
             );

$this->db->where('id', $id);
$this->db->update('mytable', $data);

Is doing this allowed in codeigniter

$data = array(
               'title' => $title,
               'name' => $name,
               'date' => $date
             );

$where = "id=$id, name='Joe' AND status='boss'";

$this->db->where($where);

$this->db->update('mytable', $data);