Increment field of mysql database using codeigniter's active record syntax

Question

I have the following php-codeigniter script which attempts to increment a field of a record using active-record syntax:

$data = array(\'votes\' => \'(vote         


        

Answer 1

$data = array('votes' => 'votes + 1');

foreach ($data as $key=>$val) {
    $this->db->set($key, $val, FALSE);
}

$this->db->where('id', $post['identifier']);
$this->db->update('users', $data);