atg - 如何在ATG中修改当前订单中一个commerceItem的数量？

Question

我想使用 CartModifierFormHandler 修改当前订单中的 commerceItem 数量。

我已通过 catalogRefId & new quantity然后调用 CartModifierFormHandler.setOrderByCommerceId或 setOrder但它修改了除了我要修改的项目之外的所有项目的数量。有人能告诉我出了什么问题或怎么做吗？

Answer 1

如果您使用的是开箱即​​用的 setOrderByCommerceId方法(这绝对是要走的路，因为它已经处理了所有与事务相关的代码)，那么您需要记住以下几点。
setOrderByCommerceId将调用 modifyOrderByCommerceId开箱即用 CartModifierFormHandler .这反过来调用 getQuantity

public long getQuantity(String pCatalogRefId, DynamoHttpServletRequest pRequest, DynamoHttpServletResponse pResponse) throws ServletException, IOException, NumberFormatException {
    Object value = pRequest.getParameter(pCatalogRefId);
    if (value != null) {
        return Long.parseLong(value.toString());
    }
    return getQuantity();
}    

所以从这个片段中应该清楚的是，除非你传递每个现有 commerceItem 的单独数量对于请求，您只需更新每个 commerceItem 的数量s 到相同的数量。

这是更新数量的简化版本:

public boolean handleUpdateItemQuantityToOrder(DynamoHttpServletRequest request, DynamoHttpServletResponse response) throws ServletException, IOException {
    Order order = getOrder();

    //Get All the Commerce Items on the Order
    List<CommerceItem> commerceItems = order.getCommerceItems();
    String currentSku = "";

    // currentCommerceItem is the one that you passed from your JSP page
    String currentId = getCurrentCommerceItem();

    // Add all the existing commerce item quantities to the request
    for (CommerceItem commerceItem : commerceItems) {
        request.setParameter(commerceItem.getId(), commerceItem.getQuantity());
        if (commerceItem.getId().equals(currentId)) {
            currentSku = commerceItem.getCatalogRefId();
        }
    }

    // the quantity element is from the JSP page. Set it to the Sku you want to change on the request.
    request.setParameter(currentId, getQuantity());

    // Set the new quantity for the commerce item being updated.
    setCheckForChangedQuantity(true);

    handleSetOrderByCommerceId(request, response); // Pass the order updates to a REAL ATG method so you don't have to write it yourself

    return checkFormRedirect(getUpdateSuccessURL(), getUpdateErrorURL(), request, response);
}

希望这会有所帮助。