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

With the development of Internet technology, many traditional restaurants have also begun to transform to digitalization, among which the ordering system has become an important part of the digitalization of restaurants. In the ordering system, the employee management function is an indispensable part. It can help restaurant administrators better manage employee information, attendance records, work allocation, etc. This article will introduce how to use Go language to develop the employee management function of the ordering system, and provide specific code examples. I hope it can provide some help to readers who need to develop similar functions.

1. Build a development environment

Before starting development, we need to set up a development environment for the Go language. First, you need to install the Go language operating environment and development tools. It is recommended to choose the official Go language official website to download and install. After the installation is complete, configure the environment variables so that the Go command can be used anywhere.

2. Design database model

Before developing the employee management function, we need to design the database model. In this article, we will use the Go language's orm framework gorm to operate the database. We need to first define an employee structure, as shown below:

type Employee struct {
    ID       uint   `gorm:"primary_key"`
    Name     string `gorm:"type:varchar(50)"`
    Phone    string `gorm:"type:varchar(50)"`
    Position string `gorm:"type:varchar(50)"`
}

In this structure, we define four attributes of the employee: ID, Name, Phone and Position. Among them, ID is the primary key, Name is the employee's name, Phone is the phone number, and Position is the position. We can add or modify employee attributes according to actual needs.

3. Initialize the database

After designing the database model, we need to initialize the database. The sql package is provided in the Go language for operating the database. We need to connect to the database first and create a table for the Employee model in the program, as shown below:

package main

import (
    "fmt"
    "log"

    "github.com/jinzhu/gorm"
    _ "github.com/jinzhu/gorm/dialects/mysql"
)

type Employee struct {
    ID       uint   `gorm:"primary_key"`
    Name     string `gorm:"type:varchar(50)"`
    Phone    string `gorm:"type:varchar(50)"`
    Position string `gorm:"type:varchar(50)"`
}

func main() {
    // 连接数据库
    db, err := gorm.Open("mysql", "root:password@tcp(127.0.0.1:3306)/test?charset=utf8&parseTime=True&loc=Local")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    // 自动创建表
    db.AutoMigrate(&Employee{})
    fmt.Println("create employee table successfully")
}

In this program, we use gorm .Open connected to the MySQL database and automatically created the Employee table through the db.AutoMigrate function.

4. Add employee information

Next, we need to write the code to add employee information. We can add employee information by reading user input during program execution. The example is as follows:

func main() {
    // 连接数据库
    db, err := gorm.Open("mysql", "root:password@tcp(127.0.0.1:3306)/test?charset=utf8&parseTime=True&loc=Local")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    // 添加员工信息
    var employee Employee
    fmt.Println("请输入员工姓名：")
    fmt.Scanln(&employee.Name)
    fmt.Println("请输入员工电话：")
    fmt.Scanln(&employee.Phone)
    fmt.Println("请输入员工职位：")
    fmt.Scanln(&employee.Position)

    db.Create(&employee)
    fmt.Println("add employee successfully")
}

In this program, we read user input through the fmt.Scanln function and use the db.Create function to Add employee information to the database.

5. Query employee information

We also need to implement the function of querying employee information. Query operation is one of the most commonly used functions in the employee management function of the ordering system. It can not only query the information of a single employee, but also view the entire employee list. The sample code is as follows:

func main() {
    // 连接数据库
    db, err := gorm.Open("mysql", "root:password@tcp(127.0.0.1:3306)/test?charset=utf8&parseTime=True&loc=Local")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    // 查询员工信息
    var employees []Employee
    db.Find(&employees)
    fmt.Println("======= 员工列表 =======")
    for _, employee := range employees {
        fmt.Printf("姓名：%s，电话：%s，职位：%s
", employee.Name, employee.Phone, employee.Position)
    }

    var id uint
    fmt.Println("请输入员工ID：")
    fmt.Scanln(&id)
    var target Employee
    db.First(&target, id)
    if target.ID == 0 {
        fmt.Println("查无此人")
        return
    }
    fmt.Printf("姓名：%s，电话：%s，职位：%s
", target.Name, target.Phone, target.Position)
}

In this program, we define an employees slice variable, use the db.Find function to query all employee information, and then traverse the employees slice to output the employee list. Next, we use db.First to query individual employee information through the id entered by the user.

6. Update employee information

In the ordering system, employee information may change, such as phone number changes, job changes, etc. Therefore, we need to implement the function of updating employee information. The sample code is as follows:

func main() {
    // 连接数据库
    db, err := gorm.Open("mysql", "root:password@tcp(127.0.0.1:3306)/test?charset=utf8&parseTime=True&loc=Local")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    // 更新员工信息
    var id uint
    fmt.Println("请输入员工ID：")
    fmt.Scanln(&id)
    var target Employee
    db.First(&target, id)
    if target.ID == 0 {
        fmt.Println("查无此人")
        return
    }
    fmt.Println("请输入员工姓名：")
    fmt.Scanln(&target.Name)
    fmt.Println("请输入员工电话：")
    fmt.Scanln(&target.Phone)
    fmt.Println("请输入员工职位：")
    fmt.Scanln(&target.Position)
    db.Save(&target)
    fmt.Println("update employee successfully")
}

In this program, we first use db.First to query individual employee information based on the id entered by the user, and read the user's updated information through the fmt.Scanln function, and finally use db.Save Function saves employee information.

7. Delete employee information

Finally, we need to implement the function of deleting employee information. The sample code is as follows:

func main() {
    // 连接数据库
    db, err := gorm.Open("mysql", "root:password@tcp(127.0.0.1:3306)/test?charset=utf8&parseTime=True&loc=Local")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    // 删除员工信息
    var id uint
    fmt.Println("请输入员工ID：")
    fmt.Scanln(&id)
    var target Employee
    db.First(&target, id)
    if target.ID == 0 {
        fmt.Println("查无此人")
        return
    }
    db.Delete(&target)
    fmt.Println("delete employee successfully")
}

In this program, we first use db.First to query individual employee information based on the id entered by the user, and use the db.Delete function to delete the employee information.

Summary

This article introduces how to use Go language to develop the employee management function of the ordering system. Through specific code examples, it introduces how to create an Employee data table, add employee information, query, update and delete. Common functions such as employee information. I hope this article can help readers better master Go language development skills.

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