介绍golang gorm操作mysql及gorm基本用法

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

func DbConn(MyUser, Password, Host, Db string, Port int) *gorm.DB {
 connArgs := fmt.Sprintf("%s:%s@(%s:%d)/%s?charset=utf8&parseTime=True&loc=Local", MyUser,Password, Host, Port, Db )
 db, err := gorm.Open("mysql", connArgs)
 if err != nil {
  log.Fatal(err)
 }
 db.SingularTable(true)
 return db
}

CREATE TABLE `xz_auto_server_conf` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `group_zone` varchar(32) NOT NULL COMMENT '大区例如：wanba,changan,aiweiyou,360',
 `server_id` int(11) DEFAULT '0' COMMENT '区服id',
 `server_name` varchar(255) NOT NULL COMMENT '区服名称',
 `open_time` varchar(64) DEFAULT NULL COMMENT '开服时间',
 `service` varchar(30) DEFAULT NULL COMMENT '环境，test测试服，formal混服，wb玩吧',
 `username` varchar(100) DEFAULT NULL COMMENT 'data管理员名称',
 `submit_date` datetime DEFAULT NULL COMMENT '记录提交时间',
 `status` tinyint(2) DEFAULT '0' COMMENT '状态，0未处理，1已处理，默认为0',
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

//定义struct
type XzAutoServerConf struct {
 GroupZone string `gorm:"column:group_zone"`
 ServerId int
 OpenTime string
 ServerName string
 Status int
}

//定义数据库连接
type ConnInfo struct {
 MyUser string
 Password string
 Host string
 Port int
 Db string
}

func main () {
cn := ConnInfo{
  "root",
  123456",
  "127.0.0.1",
  3306,
  "xd_data",
 }
  db := DbConn(cn.MyUser,cn.Password,cn.Host,cn.Db,cn.Port)
  defer db.Close() // 关闭数据库链接，defer会在函数结束时关闭数据库连接
 var rows []api.XzAutoServerConf
//select 
db.Where("status=?", 0).Select([]string{"group_zone", "server_id", "open_time", "server_name"}).Find(&rows)
//update
 err := db.Model(&rows).Where("server_id=?", 80).Update("status", 1).Error
 if err !=nil {
 fmt.Println(err)
 }
fmt.Println(rows)
}

go get github.com/jinzhu/gorm
go get github.com/go-sql-driver/mysql

packae main
import (
 "github.com/jinzhu/gorm"
 _ "github.com/jinzhu/gorm/dialects/mysql"
 "fmt"
)
func main() {
 db, err := gorm.Open("mysql",
 "root:root@/test?charset=utf8&parseTime=True&loc=Local")

 if err != nil {
  fmt.Println(err)
  return
 }else {
  fmt.Println("connection succedssed")
 }
 defer db.Close()

type User struct {
 ID  int   `gorm:"primary_key"`
 Name string   `gorm:"not_null"`
}
func add() {
 user := &User{Name:"zhangsan"}
 db.Create(user)
}

user := &User{ID:1}
db.delete(user)

user := &User{ID:1}
db.Model(user).update("Name","lisi")

// query all
var users []User
db.Find(&users)
fmt.Println(users)
// query one
user := new (User)
db.First(user,1)
fmt.Println(user)

db.HasTable(User{})

db.CreateTable(User{})