如何在 Prestashop 中将付款费用添加到购物车？

Question

我想使用为支付费用创建的产品将支付费用添加到购物车。但是，当我将产品添加到购物车以收取费用时，我使用 $cart->getOrderTotal()，它并没有显示带费用的实际价格。它将订单总额显示为不收费的产品价格。

我为此操作使用 SpecificPrice 类。而且我认为后台的 prestashop 订单页面首先会读取具有特定价格的产品。但是，它不显示付款价格，而是与我添加的产品的价格一起显示。

也许你没有这样理解，但我在下面的 cmets 中解释得更好。请帮我。我已经挣扎了2天。 :(

$specific_price = new SpecificPrice();
        $specific_price->id_product = 50; // choosen product id
        $specific_price->id_customer = (int) $cart->id_customer;
        $specific_price->id_product_attribute = 0;
        $specific_price->id_cart = (int)$cart->id;
        $specific_price->id_shop = (int) $cart->id_shop;
        $specific_price->id_currency = (int) $cart->id_currency;
        $specific_price->id_country = Context::getContext()->country->id;
        $specific_price->id_group = 0;
        $specific_price->from_quantity = 1;
        $specific_price->price = $installment_fee; //installment fee is here. (example: 1.13)
        $specific_price->reduction_type = 'amount';
        $specific_price->reduction_tax = 1;
        $specific_price->reduction = 0;
        $specific_price->from = date("Y-m-d H:i:s");
        $dateUntil = new DateTime(); $dateUntil->modify("+2 days");
        $specific_price->to = $dateUntil->format('Y-m-d H:i:s'); // or set date x days from now
        try{
            $specific_price->add(1,1);
        } catch (\Exception $exception)
        {
            echo $exception->getMessage(); die;
        }

        //cart product price = 30
        //installment fee product = 10 (i want to edit it with installment fee (ex: 1.13))
        $cart->updateQty(1,50); 
        //the real product is here. Price: 10, but i want to use it with specific price created above.So product price + specific price.
        //but it shows product price(30) + product price(10)
        //but i want product price(30) + product price(1.13) 
        
        echo '<pre>';
        print_r($cart->getOrderTotal()); //it shows 40 but i want 31.13
        exit;

Answer 1

我解决了这个问题。问题是在将产品添加到购物车后清除卡片缓存。

如果遇到此问题，请在 validateOrder 函数前添加以下代码。

Cart::resetStaticCache();