How 2 exclude vouchers from quantity discount calc

[nate_02631]

Hi all,

 

Apologies if this has been covered before... I have the Gift Voucher contrib on my site along with the default quantity discount order total module at checkout, which gives an X% discount for two or more items purchased, etc...

 

The problem is that when a customer purchases a voucher and another item, the cart (quite correctly) applies my quantity discount to both the voucher and the item. When the person receiving/redeeming the voucher uses it (and is purchasing >1 item) they *also* get the quantity discount.

 

So in effect, the voucher amount is being discounted *twice*... Does anyone have a suggestion on modifying the Qty Discount order total module so that it excludes certain items upon checkout -- such as items whose model #'s begin with GIFT_

 

I've look at the qty order total module and is uses a class function which is likely used in many other areas of the site, so I was reluctant to change that...

 

Any suggestions are appreciated.