Increase row value in codeigniter

Question

I would like to use codeigniter syntax to increase a row value.

        $count = 1 ;
        $this->db->where('id',$coupon->parent);
        $this->db->set('current_users', 'current_users + '.$count, FALSE);
        $this->db->update('coupons');

but this code increase current_users field amount to 2.

ex:

if current_users be 10 my code increase it to 12 instead of 11 !

Answer 1

Try using this

    $count = 1 ;
    $this->db->where('id',$coupon->parent);
    $this->db->set('current_users', "current_users + $count", FALSE);
    $this->db->update('coupons');

Answer 2

Try after changing this line

 $this->db->set('current_users', 'current_users + '.$count, FALSE);

To

 $this->db->set('current_users', "`current_users` + $count", FALSE);

Answer 3

$count = 1 ;
$this->db->where('id',$coupon->parent);
$this->db->set('current_users', 'current_users+'.$count, FALSE);
$this->db->update('coupons');

static :

$this->db->set('current_users', 'current_users+1', FALSE);