How to use Go language to develop the order management function of the ordering system

Now more and more restaurants are beginning to use ordering systems to improve efficiency, among which order management is a very important function. This article will introduce how to use Go language to develop the order management function of the ordering system and provide specific code examples.

1. Requirements analysis of order management function

Before developing the order management function, we need to clarify its requirements first to facilitate subsequent development work.

1. Add new order: The user submits order information through the ordering page, and the order information needs to be added to the order list.
2. View order information: Users can view created order information through the order list, including order id, order time, order status (pending, in progress, completed), total order amount, etc.
3. Modify order information: Since the order information may continue to change, for example, the user needs to update the dishes in the order, or the delivery address, etc., it is necessary to provide the function of modifying the order.
4. Delete order: If the order has expired or the user cancels the order, you need to provide the function of deleting the order.
5. Order status update: It is necessary to provide real-time update of the order status. For example, when the order is delivered, the status needs to be updated in real time to "Delivering".

2. Database design

Before starting to implement the order management function, it is necessary to design the database table structure related to order management.

We can design two tables to manage order information, namely the order table (orders) and the order details table (order_items).

Among them, the order table is mainly used to store the overall information of the order, such as order id, order status, order time, total order price, etc.

The order details table is used to store the detailed information of each order, such as the purchased dish ID, quantity, unit price, etc.

Through this design method, order information can be managed and maintained more conveniently.

The following is the database design of orders and order details tables:

Orders table (orders):

CREATE TABLE `orders` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) NOT NULL,
  `status` tinyint(4) NOT NULL DEFAULT '0' COMMENT '0：待处理，1：正在配送，2：已完成',
  `create_time` datetime NOT NULL,
  `total_price` int(11) NOT NULL,
  `delivery_address` varchar(255) DEFAULT '',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

Order details table (order_items):

CREATE TABLE `order_items` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `order_id` int(11) NOT NULL,
  `product_id` int(11) NOT NULL,
  `product_name` varchar(255) NOT NULL,
  `product_price` int(11) NOT NULL,
  `product_count` int(11) NOT NULL,
  `create_time` datetime NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

3. Develop order management function

1. Add new order

First, you need to insert the new order information in the order table, and then insert each product in the order details table Information.

The following is a code example for adding a new order:

func AddOrder(w http.ResponseWriter, r *http.Request) {
    // 解析请求参数
    r.ParseForm()
    userId, _ := strconv.Atoi(r.Form.Get("user_id"))
    products := r.Form.Get("products")
    deliveryAddress := r.Form.Get("delivery_address")
    
    // 计算订单总价
    totalPrice := 0
    productIds := strings.Split(products, ",")
    for _, productId := range productIds {
        product, _ := GetProductById(productId)
        totalPrice += product.Price
    }
    
    // 添加订单到数据库
    now := time.Now().Format("2006-01-02 15:04:05")
    orderId, _ := AddOrderToDB(userId, totalPrice, deliveryAddress, now)
    
    // 添加订单详情到数据库
    for _, productId := range productIds {
        product, _ := GetProductById(productId)
        orderItem := OrderItem{
            OrderId:    orderId,
            ProductId:  productId,
            ProductName:product.Name,
            ProductPrice:product.Price,
            ProductCount:1,
            CreateTime:now,
        }
        AddOrderItemToDB(orderItem)
    }
    
    // 返回成功信息
    resp := Resp{Code: 200, Msg: "add order success"}
    WriteJSON(w, resp)
}

In the above code, we first parse the request parameters and calculate the total price of the order. Then, add the order information and order details information to the database respectively.

2. View order information

Users can view created order information through the order list. We need to query the order list from the database and display it.

The following is a code example for viewing the order list:

func GetOrderList(w http.ResponseWriter, r *http.Request) {
    // 查询数据库获取订单列表
    orders, _ := GetOrderListFromDB()

    // 构造响应数据
    resp := Resp{Code: 200, Data: orders}

    // 返回订单列表数据
    WriteJSON(w, resp)
}

In the above code, we query the order list from the database and return it to the front-end page. When querying the order list, the order details need to be queried and displayed.

3. Modify order information

Since the order information may continue to change, for example, the user needs to update the dishes in the order, or the delivery address, etc., so it is necessary to provide the function of modifying the order. .

The following is a code example for modifying order information:

func UpdateOrder(w http.ResponseWriter, r *http.Request) {
    // 解析请求参数
    r.ParseForm()
    orderId, _ := strconv.Atoi(r.Form.Get("order_id"))
    deliveryAddress := r.Form.Get("delivery_address")

    // 更新订单信息到数据库中
    UpdateOrderToDB(orderId, deliveryAddress)

    // 返回成功信息
    resp := Resp{Code: 200, Msg: "update order success"}
    WriteJSON(w, resp)
}

In the above code, we first parse the request parameters and update the modified order information (such as shipping address) to the database , and then return information that the modification was successful.

4. Delete order

If the order has expired or the user cancels the order, the function of deleting the order needs to be provided.

The following is a code example to delete an order:

func DeleteOrder(w http.ResponseWriter, r *http.Request) {
    // 解析请求参数
    r.ParseForm()
    orderId, _ := strconv.Atoi(r.Form.Get("order_id"))

    // 从数据库中删除订单信息
    DeleteOrderFromDB(orderId)

    // 返回成功信息
    resp := Resp{Code: 200, Msg: "delete order success"}
    WriteJSON(w, resp)
}

In the above code, we get the order id from the request parameter and delete the order from the database. Then return the successful deletion information.

5. Order status update

When delivering an order, we need to update the order status in real time.

The following is a code example for updating the order status:

func UpdateOrderStatus(w http.ResponseWriter, r *http.Request) {
    // 解析请求参数
    r.ParseForm()
    orderId, _ := strconv.Atoi(r.Form.Get("order_id"))
    status, _ := strconv.Atoi(r.Form.Get("status"))

    // 更新订单状态到数据库中
    UpdateOrderStatusToDB(orderId, status)

    // 返回成功信息
    resp := Resp{Code: 200, Msg: "update order status success"}
    WriteJSON(w, resp)
}

In the above code, we get the order id and new status value from the request parameters, and update the order's status to in the database. Then return information that the update was successful.

4. Summary

This article introduces how to use Go language to develop the order management function of the ordering system, and gives specific code examples. The order management function is a very important function in the ordering system. By implementing this function, the efficiency of the restaurant and the user experience can be improved.

When implementing the order management function, you need to follow the rules of database design, and strict parameter verification is required for additions, deletions, modifications and checks of orders to ensure the security and correctness of the system.

The above is the detailed content of How to use Go language to develop the order management function of the ordering system. For more information, please follow other related articles on the PHP Chinese website!