GX-Entwicklung

Beim Einlösen eines prozentualen Rabatt-Kupons, der auf Kategorien eingeschränkt ist, wird die MwSt. falsch berechnet, sofern für die Kundengruppe Nettopreise angezeigt werden.
Außerdem verdoppelt sich fälschlicherweise der Kuponwert, wenn man einen weiteren Artikel im Warenkorb hat, der nicht in der Kategorie liegt, wo der Rabatt-Kupon gilt.

EDIT 08.10.2019

When you redeem a percentage discount coupon that is restricted to categories, VAT is calculated incorrectly if net prices are displayed for the customer group.
Also, if you have another item in your shopping cart that is not in the category where the discount coupon applies, the coupon value is wrongly doubled.

Preconditions:

1. Have at least 2 categories with products ready
2. go to Customers > Customer Groups >>> Create
3. choose a name for the Customer Group and fill in the forms as follows:
4. Prices tax: excl. tax
5. Show tax in order total: true
6. Show prices: true
7. add this customer group
8. add a customer (user1) to this customer group (Customers > Customers >> Customer Status (dropdown), choose the respective customer group
9. go to Shop Settings > Special Modules >>> Activate Gift Voucher System (true)
10. go to Vouchers > Coupon Admin >>> Create
11. choose a name for your new coupon and fill in the forms as follows:
12. Coupon Amount: 50%
13. Coupon Code: xxx
14. Uses per Customer: [nothing]

15. Valid Category List: [ID of one category]

16. log into frontend as user1

17. go to the category where the 50%-coupon applies

18. put an item from this category into the basket

19. go to your basket

20. apply the coupon

21. calculate the VAT

22. expected:

23. item 1: 18.49 € (without VAT)

24. coupon: 50%

25. shipping: free
    
    18.49 € / 2 = 9.245 € (item1 - 50% = 9.245 € 9.245 € + VAT 19% = 11.00155 €)
    9.245 € x 1.19 = 11.00155 € (total)
    
    11.00155 € - 9.245 € = 1.75655 € (VAT)
    
    the shop whatsoever calculates 2.04 € VAT which equals 11.28 € (total)

26. now put an additional item in the basket, from another category, where the coupon doesn't apply

27. go to your basket

28. calculate the VAT, the coupon and the total

29. expected:

30. item1: 18.49 €

31. item2: 16.76 €

32. coupon: 50%
    *shipping: free
    18.49 € / 2 = 9.245 €
    
    16.76 € + 9.245 € = 26.005 €
    
    26.005 € x 1.19 = 30.94595 € (total)
    
    30.94595 € - 26.005 € = 4.94095 € (VAT)
    
    the shop whatsoever applies the coupon two times on item1 (-18.50 €) and the VAT is also calculated wrong (see screenshot)