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

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

Introduction:
The rapid development of modern society has made people’s demand for delicious food more and more diversification. With the rise of the takeout industry, the ordering system has become an important part of the catering business. The evaluation management function plays an important role in the ordering system, helping merchants obtain user feedback in real time and further improve the merchant's service quality. This article will introduce how to use Go language to develop the evaluation management function of the ordering system and provide specific code examples.

1. Requirements Analysis
The evaluation management function mainly includes the following requirements:

1. Users can evaluate completed orders.
2. Merchant can browse and reply to user reviews.
3. Users can view merchants’ responses to their reviews.

2. Database design
In order to meet the needs of evaluation management functions, we need to design the corresponding table structure of the database. The system mainly includes order table (order), dish table (dish), user table (user), evaluation table (comment) and reply table (reply).

1. Order table (order): records the basic information of the order, such as order number, user ID, merchant ID, etc.
2. Dish list (dish): Record the basic information of the dishes, such as dish ID, dish name, price, etc.
3. User table (user): records basic information of users, such as user ID, user name, phone number, etc.
4. Evaluation table (comment): records the user’s evaluation information on the order, such as evaluation ID, order ID, evaluation content, etc.
5. Reply table (reply): records the merchant’s reply information to user reviews, such as reply ID, evaluation ID, reply content, etc.

3. Code Implementation
Next, we use Go language to write code to implement the evaluation management function of the ordering system. First, we need to create the corresponding data structure to map with the database table.

1. Define the Order structure:

type Order struct {
    ID       int
    UserID   int
    ShopID   int
    Dishes   []Dish
    Comments []Comment
}

2. Define the Dish structure:

type Dish struct {
    ID       int
    Name     string
    Price    float64
    Quantity int
}

3. Define user (User) structure:

type User struct {
    ID       int
    Username string
    Phone    string
}

4. Define evaluation (Comment) structure:

type Comment struct {
    ID      int
    OrderID int
    Content string
    Reply   Reply
}

5. Define reply (Reply) structure ：

type Reply struct {
    ID      int
    CommentID int
    Content string
}

Next, we need to write the corresponding function to implement the evaluation management function.

6. User comments (OrderID is the order ID):

func AddComment(OrderID int, content string) error {
    // 首先查询订单是否存在
    order, err := GetOrder(OrderID)
    if err != nil {
        return err
    }
    comment := Comment{
        ID:      generateCommentID(),
        OrderID: OrderID,
        Content: content,
    }
    order.Comments = append(order.Comments, comment)
    // 更新订单的评价信息到数据库
    err = UpdateOrder(order)
    if err != nil {
        return err
    }
    return nil
}

7. Merchant replies to the comment (CommentID is the evaluation ID):

func AddReply(CommentID int, content string) error {
    // 首先查询评价是否存在
    comment, err := GetComment(CommentID)
    if err != nil {
        return err
    }
    reply := Reply{
        ID:        generateReplyID(),
        CommentID: CommentID,
        Content:   content,
    }
    comment.Reply = reply
    // 更新评价的回复信息到数据库
    err = UpdateComment(comment)
    if err != nil {
        return err
    }
    return nil
}

8. Users view comments and replies (OrderID is the order ID):

func GetCommentAndReply(OrderID int) (Comment, Reply, error) {
    comment, err := GetCommentByOrderID(OrderID)
    if err != nil {
        return Comment{}, Reply{}, err
    }
    reply, err := GetReplyByCommentID(comment.ID)
    if err != nil {
        return comment, Reply{}, err
    }
    return comment, reply, nil
}

The above is just a simple function example of related functions. In actual development, database operations and specific business must be combined. Logic to complete specific functions. In addition, in order to ensure the security and stability of the system, operations such as data verification, exception handling, and logging are also required.

Conclusion:
This article introduces how to use Go language to develop the evaluation management function of the ordering system, and provides relevant code examples. Through the evaluation management function, merchants can understand user feedback in a timely manner and provide timely replies to improve service quality. At the same time, in actual development, we need to expand and optimize functions according to specific business needs to ensure high performance and stability of the system.

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