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  • Lasse Kofoed 42 posts 159 karma points
    Feb 17, 2015 @ 18:33
    Lasse Kofoed

    ChangePriceGroup and recalculate tax

    Hi there

    How can i trigger a complete relaculations of tax on the basket. ?

    Im using UCommerce.Api.CatalogLibrary.ChangePriceGroup(priceGroup, true) to change the pricegroup.

    But items already in the basket, maintains the tax from when first added to the basket.

    I have tried TransactionLibrary.ExecuteBasketPipeline() , and read somewhere that the recalc tax is only done when new items are added to the basket. But is does not seam to have a effect on the items already in the basket.

    Can some one point me in the right direction.

    Thank you in advance.

  • Lasse Kofoed 42 posts 159 karma points
    Feb 18, 2015 @ 15:33
    Lasse Kofoed

    I found that if I change the PriceGroup with the UCommerce.Api.CatalogLibrary.ChangePriceGroup(priceGroup, true), and delete all orderlines and re-add them again, the total tax is correct.

    /// This is some dirty hacking shit.. !!
            List<OrderLine> oldOrderlines = new List<OrderLine>();
            foreach (OrderLine ol in oldOrderlines)
            foreach (OrderLine ol in oldOrderlines)
                TransactionLibrary.AddToBasket(ol.Quantity, ol.Sku, ol.VariantSku, addToExistingLine: false);
        catch (Exception ex)

    I really dont like the way of handling this. How can i trigger a calculate tax on all products in the basket ?

  • Morten Skjoldager 436 posts 1492 karma points
    Feb 24, 2015 @ 11:40
    Morten Skjoldager

    Hi Lasse, you're right, that is a bad behaviour :) 

    We are looking into this right now.

    The best way forward would be to do it like this (on top of my head):

    I think you would have to override the CatalogLibrary yourself, and when change pricegroup is called, then you could call the code underneath. See on docs here how to achieve it: (same method applies to CatalogLibrary).

           private bool TryUpdatePricingToMatchNewPriceGroup(PriceGroup priceGroup, OrderLine orderLine)
                var product = _productRepository.SingleOrDefault(x => x.Sku == orderLine.Sku && x.VariantSku == orderLine.VariantSku);
                if (product == null) return false;
                Money unitPrice = _pricingService.GetProductPrice(product, priceGroup);
                if (unitPrice == null) return false;
                // Override price group's currency with currency
                // from unit price in case a custom pricing
                // service decides to override currency.
                priceGroup.Currency = unitPrice.Currency;
                var unitTax = _taxService.CalculateTax(product, priceGroup, unitPrice);
                if (unitTax == null) return false;
                orderLine.Price = unitPrice.Value;
                orderLine.VAT = unitTax.Value;
                orderLine.VATRate = priceGroup.VATRate;
                return true;

    Hope this helps

    Best regards 


  • Kasper Vesth 2 posts 22 karma points
    Jun 01, 2015 @ 15:39
    Kasper Vesth

    I know the answer has been marked as accepted, but I have a followup to this. I am using uCommerce 6.6.3 and as far as I can see in the source code, the api does call the TryUpdatePricingToMatchNewPriceGroup subroutine. But the price isn't updated when I call the function. I can see the PriceGroup is changed correctly and if I manipulate the basket by adding another product of the same type it recalculates the entire basket. Am I missing something? 

    I am calling it like this: 

    UCommerce.Api.CatalogLibrary.ChangePriceGroup(priceGroup, true);

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