go技术之gorm操作实战

安装环境

go get -u github.com/jinzhu/gorm

一. model结构体

在线转换
https://printlove.cn/tools/sql2gorm
model的结构：

package model

import (
   "database/sql"
)

type User_Gorm struct {
   UserId    int          `gorm:"column:user_id;type:int(11);primary_key" json:"user_id"`
   UserName  string       `gorm:"column:user_name;type:varchar(60);NOT NULL" json:"user_name"`
   Password  string       `gorm:"column:password;type:varchar(32)" json:"password"`
   Sex       int          `gorm:"column:sex;type:int(11)" json:"sex"`
   Birthday  sql.NullTime `gorm:"column:birthday;type:timestamp" json:"birthday"`
   LastLogin sql.NullTime `gorm:"column:last_login;type:timestamp" json:"last_login"`
   BindPhone string       `gorm:"column:bind_phone;type:varchar(20)" json:"bind_phone"`
   RegTime   sql.NullTime `gorm:"column:reg_time;type:timestamp" json:"reg_time"`
}

二. 执行语句

package order

import (
   "database/sql"
   "fmt"
   "sql-operator/model"
   "time"

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

var gorm_db *gorm.DB

func ConnectGormDatabases() {
   //"用户名:密码@[连接方式](主机名:端口号)/数据库名"
   var err error
   gorm_db, err = gorm.Open("mysql", "root:Xcy3329257@(localhost)/db_common?charset=utf8mb4&parseTime=True&loc=Local")
   if err != nil {
      fmt.Println("gorm数据库连接成功")
      panic(err)
   }
}

func CloseGormDatabases() {
   gorm_db.Close()
}

func SelectGormUser() {
   var users []model.User_Gorm
   // Get all records
   result := gorm_db.Find(&users)
   println("查找到的result数目" + fmt.Sprintf("%d", result.RowsAffected))
   for i := 0; i < len(users); i++ {
      fmt.Printf("i=%d value=%v \n", i, users[i])
   }
}

func InsertGormUser() {
   //user := model.User{UserId: 13, UserName: "tomxiang10", Password: "admin10", Sex: 1, Birthday: sql.NullTime{time.Now(), true}, LastLogin: sql.NullTime{time.Now(), true}, BindPhone: "15817304444", RegTime: sql.NullTime{time.Now(), true}}
   user := model.User_Gorm{UserName: "tomxiang10", Password: "admin10", Sex: 1, Birthday: sql.NullTime{time.Now(), true}, LastLogin: sql.NullTime{time.Now(), true}, BindPhone: "15817304444", RegTime: sql.NullTime{time.Now(), true}}
   gorm_db.Create(&amp;user)
}

func DeleteGormUser() {
   var user model.User_Gorm
   gorm_db.Where("user_id = ?", 14).Take(&amp;user)
   gorm_db.Delete(user)
}

func UpdateGormUser() {
   var user model.User_Gorm
   //查找user_id=13
   gorm_db.Where("user_id = ?", 13).Take(&amp;user)
   //修改为当前时间
   user.Birthday = sql.NullTime{time.Now(), true}
   user.RegTime = sql.NullTime{time.Now(), true}
   user.LastLogin = sql.NullTime{time.Now(), true}
   gorm_db.Save(user)
}

参考链接

1. gorm官网