顾名思义，Payvment允许您使用一个RESTAPI创建、编辑和修改购物车，这样就可以很容易地将购物车功能整合到一个web应用程序中。
As the name suggests, Payvment allows you to create, edit, and modify shopping carts using a REST API, making it possible to easily integrate shopping cart capabilities into a web application.
完成了这个改变，您就完成了对购物车的修改。
With this change, your modifications to the shopping cart are complete.
用户还可以使用UPDATE或DELETE查询修改数量或从购物车中删除商品。
Users can also modify quantities or remove items from their shopping carts using UPDATE or DELETE queries.
清单20给出了为了将购物车包含到会话中要对products方法所做的修改。
Listing 20 shows the change to the products method that will include the cart currently stored in the session.
店家：您可以把它们放进购物车然后去支付，稍后我会给您修改价格。 萐。
Seller: : You can put them in your cart and pay for it. And I'll change the price for you later.
店家：您可以把它们放进购物车然后去支付，稍后我会给您修改价格。 萐。
Seller: : You can put them in your cart and pay for it. And I'll change the price for you later.
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