(Estimated time to complete: 6 minutes)

Instructions

1. Install Shopify’s Script Editor app (link)

2. Navigate to Apps → Script Editor

3. Create a new blank script

   

4. Title the script: Fondue block coupon codes for CashBack orders

   

5. Paste the following code into the Ruby source code box

   cashback_products_vendor = "Fondue"
   cashback_products_product_type_prefix = "Fondue Cashback"
   error_message = "Discount codes cannot be applied with CashBack"
   
   has_cashback_product = Input.cart.line_items.any? { |item| 
     item.variant.product.vendor == cashback_products_vendor ||
     item.variant.product.product_type.start_with?(cashback_products_product_type_prefix)
   }
   has_discount_code = Input.cart.discount_code != nil
   
   if has_cashback_product and has_discount_code
     Input.cart.discount_code.reject(
       message: error_message
     )
   end
   
   Output.cart = Input.cart
   

6. Press Save and publish