How to use Go language to write the user account management module in the door-to-door cooking system?

How to use Go language to write the user account management module in the door-to-door cooking system?

In modern fast-paced life, more and more people choose to solve their dietary problems through door-to-door cooking services. For this service provider, a complete and sound user account management system is very important. This article will introduce how to use Go language to write a user account management module, aiming to help home cooking service providers better manage users' account information, and provide specific code examples.

1. Create a database table

First, you need to create a user account table to store the user's account information. Data can be stored using relational databases (such as MySQL, PostgreSQL, etc.) or non-relational databases (such as MongoDB).

In MySQL, you can use the following SQL statement to create a user account table:

CREATE TABLE user (
    id INT PRIMARY KEY AUTO_INCREMENT,
    username VARCHAR(50) NOT NULL,
    password VARCHAR(100) NOT NULL,
    email VARCHAR(100) NOT NULL
);

2. Write Go code

Next, we use Go language to write a user Code for the account management module. First, you need to introduce the necessary packages:

package main

import (
    "database/sql"
    "fmt"

    _ "github.com/go-sql-driver/mysql"
)

Then, define a structure to represent the user account:

type User struct {
    ID       int
    Username string
    Password string
    Email    string
}

Then, write some functions to implement specific functions:

1. Connect database function:

func connectDB() (*sql.DB, error) {
    db, err := sql.Open("mysql", "username:password@tcp(host:port)/database")
    if err != nil {
        return nil, err
    }
    return db, nil
}

2. Create user account function:

func createUser(user User) error {
    db, err := connectDB()
    if err != nil {
        return err
    }
    defer db.Close()

    _, err = db.Exec("INSERT INTO user (username, password, email) VALUES (?, ?, ?)",
        user.Username, user.Password, user.Email)
    if err != nil {
        return err
    }
    return nil
}

3. Query user account function based on user name:

func getUserByUsername(username string) (User, error) {
    db, err := connectDB()
    if err != nil {
        return User{}, err
    }
    defer db.Close()

    var user User
    err = db.QueryRow("SELECT id, username, password, email FROM user WHERE username = ?", username).
        Scan(&user.ID, &user.Username, &user.Password, &user.Email)
    if err != nil {
        return User{}, err
    }
    return user, nil
}

4. Update user account function:

func updateUser(user User) error {
    db, err := connectDB()
    if err != nil {
        return err
    }
    defer db.Close()

    _, err = db.Exec("UPDATE user SET username = ?, password = ?, email = ? WHERE id = ?",
        user.Username, user.Password, user.Email, user.ID)
    if err != nil {
        return err
    }
    return nil
}

5. Delete user account function:

func deleteUser(id int) error {
    db, err := connectDB()
    if err != nil {
        return err
    }
    defer db.Close()

    _, err = db.Exec("DELETE FROM user WHERE id = ?", id)
    if err != nil {
        return err
    }
    return nil
}

3. Test code

Finally, you can write some test code to verify the correctness of these functions:

func main() {
    // 创建用户账户
    user := User{
        Username: "john",
        Password: "123456",
        Email:    "john@example.com",
    }
    err := createUser(user)
    if err != nil {
        fmt.Println(err)
        return
    }

    // 根据用户名查询用户账户
    retrievedUser, err := getUserByUsername("john")
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(retrievedUser)

    // 更新用户账户
    retrievedUser.Username = "john2"
    err = updateUser(retrievedUser)
    if err != nil {
        fmt.Println(err)
        return
    }

    // 删除用户账户
    err = deleteUser(retrievedUser.ID)
    if err != nil {
        fmt.Println(err)
        return
    }
}

The above are the detailed steps and specific code examples for using Go language to write the user account management module in the door-to-door cooking system. By implementing this module, home cooking service providers can better manage users' account information and provide a better user experience. Hope this article helps you!

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