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Go语言 xorm快速上手笔记

柳弘方
2023-12-01

https://xorm.io/zh/

1. 安装

go get github.com/go-xorm/xorm #安装xorm
go get -u github.com/go-sql-driver/mysql #安装MySQL驱动
go mod tidy

go mod tidy

  • 引用项目需要的依赖增加到go.mod文件。
  • 去掉go.mod文件中项目不需要的依赖。

2. 使用

package main

import (
	"fmt"
	_ "github.com/go-sql-driver/mysql"
	"github.com/go-xorm/xorm"
	"time"
)

func main() {
	var (
		userName  string = "root"
		password  string = "root"
		ipAddress string = "localhost"
		port      int    = 3306
		dbName    string = "test"
	)
	dataSourceName := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", userName, password, ipAddress, port, dbName)
	engine, err := xorm.NewEngine("mysql", dataSourceName)
	if err != nil {
		fmt.Println("数据库连接失败!")
	}

	type User struct {
		Id      int64
		Name    string
		Age     int
		Passwd  string    `xorm:"varchar(200)"`
		Created time.Time `xorm:"created"`
		Updated time.Time `xorm:"updated"`
	}

	err = engine.Sync(new(User))
	if err != nil {
		fmt.Println("表结构同步失败")
	}
}

2. 增

插入单个数据

// 插入, 返回受影响的行数
user := User{
	Id:     1000,
	Name:   "Xiaofang",
	Age:    18,
	Passwd: "123456",
}
n, _ := engine.Insert(&user)
if n > 1 {
	fmt.Println("插入成功!")
}

插入多个参数

	// 插入, 返回受影响的行数
	user1 := User{
		Id:     1000,
		Name:   "Xiaofang",
		Age:    18,
		Passwd: "123456",
	}
	user2 := user1
	user2.Id = 1234
	
	n, _ := engine.Insert(&user1, &user2)
	if n > 1 {
		fmt.Println("插入成功!")
	}

或者

// 插入, 返回受影响的行数
user1 := User{
	Id:     1000,
	Name:   "Xiaofang",
	Age:    18,
	Passwd: "123456",
}
user2 := user1
user2.Id = 1234

var users []User
users = append(users, user1)
users = append(users, user2)

n, _ := engine.Insert(users)
if n > 1 {
	fmt.Println("插入成功!")
}

3. 删改+原生

user := User{Name: "qinjiang"}
n, _ := engine.ID(1000).Update(&user)
n, _ = engine.ID(1000).Delete(user)
engine.Exec("update `user` set Age = 10 where id = ?", 10004)

fmt.Println(n)

4. 查询

// 查询
	result1, err := engine.Query("select * from user")
	result2, err := engine.QueryString("select * from user")
	result3, err := engine.QueryInterface("select * from user")
	fmt.Println(result1)
	fmt.Println(result2)
	fmt.Println(result3)

	// Get
	user := User{}
	_, err = engine.Get(&user)
	if err != nil {
		return
	}
	fmt.Println(user)

	// 指定条件
	user1 := User{Name: "xiaofang"}
	_, err = engine.Where("name=?", user1.Name).Desc("id").Get(&user1)
	fmt.Println(user1)
	var name string
	_, err = engine.Table(&user).Where("id = 10001").Cols("name").Get(&name)
	fmt.Println(name)

	var users []User
	err = engine.Where("passwd=123456").And("age=18").Limit(10, 0).Find(&users)

	// Count 获取记录条数
	var user4 User
	user4 = User{Name: "kuangshen"}
	_, err = engine.Count(&user4)
	fmt.Println(user4)

	// Iterate和Rows
	engine.Iterate(&User{Passwd: "123456"}, func(idx int, bean interface{}) error {
		user := bean.(*User)
		fmt.Println(user)
		return nil
	})

	rows, err := engine.Rows(&User{Passwd: "123456"})
	defer rows.Close()
	userBean := new(User)
	for rows.Next() {
		err := rows.Scan(userBean)
		if err != nil {
			return 
		}
		fmt.Println(userBean)
	}

5. 事务

package main

import (
	"fmt"
	_ "github.com/go-sql-driver/mysql"
	"github.com/go-xorm/xorm"
	"time"
)

func main() {
	var (
		userName  string = "root"
		password  string = "root"
		ipAddress string = "localhost"
		port      int    = 3306
		dbName    string = "test"
	)
	dataSourceName := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", userName, password, ipAddress, port, dbName)
	engine, err := xorm.NewEngine("mysql", dataSourceName)
	if err != nil {
		fmt.Println("数据库连接失败!")
	}

	type User struct {
		Id      int64
		Name    string
		Age     int
		Passwd  string    `xorm:"varchar(200)"`
		Created time.Time `xorm:"created"`
		Updated time.Time `xorm:"updated"`
	}

	session := engine.NewSession()
	defer session.Close()

	err = session.Begin()
	defer func() {
		err := recover()
		if err != nil {
			session.Rollback()
		} else {
			session.Commit()
		}
	}()

	user1 := User{Id: 10005, Name: "123", Age: 100, Passwd: "1234567890"}
	if _, err := session.Insert(&user1); err != nil {
		panic(err)
	}

	user2 := User{Name: "kuangshe222", Age: 3}
	if _, err := session.Where("id=1000").Update(&user2); err != nil {
		panic(err)
	}

}

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