How to disable group price if coupon used

Hello all,

I'm a newbie, last october 2012 my brother and I we started our adventure with Zen-cart, my eshop in online since last january and everything working fine.
It's a installation from scratch, no upgrade at all, with a few of customization/plug-in (like template and CEON Back-in-stock notification)

My problem is this, I have some clients in a group rate with a 5% discount, now I'm giving some coupons 10% discount, I would like that if a customer of a group using coupon, discount price group will be disabled. I don't want double discount.

Reading other post, I understand that something has to be modified into ot_group_pricing.php, but unfortunately, I have no idea how to.
Can somebody help me?? Many thanks

no one can give me an help, any idea ?
many thanks

You can try customizing the file:
/includes/modules/order_total/ot_group_pricing.php

and add the code in RED:

  function calculate_deductions($order_total) {
    global $db, $order;
[B]
// bof: turn off Group Pricing when a Coupon is used
    if ($_SESSION['cc_id'] > 0) {
      return 0;
    }
// eof: turn off Group Pricing when a Coupon is used[/B]

You may wish to add some text about this on the Discount Coupons to say that Discount Coupons will result in the loss of the Group Discount ...

Yeeeessss !!!! It works perfectly !!! many and many thanks

if I make an order is shown subtotal, group discount value and total, if I redeem a coupon is shown subtotal, group discount disappears and coupon discount appears then total.

Thanks for the update that this worked for you ... :smile:

Ajeh:

You can try customizing the file:
/includes/modules/order_total/ot_group_pricing.php

and add the code in RED:

function calculate_deductions($order_total) {
global $db, $order;
[B]
// bof: turn off Group Pricing when a Coupon is used
if ($_SESSION['cc_id'] > 0) {
return 0;
}
// eof: turn off Group Pricing when a Coupon is used[/B]

> 
> You may wish to add some text about this on the Discount Coupons to say that Discount Coupons will result in the loss of the Group Discount ...

This doesn't seem to work for me, however, I have installed the Online Group Pricing mod. Is there a different file to update?

Thanks,
Andrew