Developer forum

Hello,

I have a solution where some products can only be added to the basket in multiple (e.g if 6 then only 6,12, 18, etc). I have subscribed to Line.Decreased and Line.Increased, and it works fine except for one detail : when I decrease at minimum quantity, the line stays in the basket with a quantity of one. I can't manage to simple delete the line.

ex : I have a product with a 6 multiple, and I have 6 in the cart. If I decrease, the quantity should go to 0, and the line be deleted. However this doesn't happen, I simply get a quantity of one. If I decrease again, the line is finally deleted.

Here's my code :

public class OnDecreased : Dynamicweb.Extensibility.Notifications.NotificationSubscriber
{
    public override void OnNotify(string notification, Dynamicweb.Extensibility.Notifications.NotificationArgs args)
    {
        if (args == null || !(args is Dynamicweb.Ecommerce.Notifications.Ecommerce.Cart.Line.DecreasedArgs))
            return;

        Dynamicweb.Ecommerce.Notifications.Ecommerce.Cart.Line.DecreasedArgs item = (Dynamicweb.Ecommerce.Notifications.Ecommerce.Cart.Line.DecreasedArgs)args;
        var product = item.DecreasedLine.Product;

        if (MultipleUtils.IsProductMultiple(product))
        {
            // Does return 0 if quantity goes below multiple
            var newQuantity = MultipleUtils.GetLowerMultipleQuantity(item.DecreasedLine.Quantity, product);

            item.DecreasedLine.Quantity = newQuantity;
            item.DecreasedLine.Save();             
            
            //Tried this, doesn't work            
            //if (newQuantity == 0)
            //{
            //    item.DecreasedLine.Delete();
            //    item.Cart.Save();
            //}
        }
    }
}

Thanks