gorm 关于mysql你确定知道这些?

gorm连接mysql数据库

package main

import (
	"fmt"
	"time"

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

/*
 * @Description:
 * @Version: 1.0
 * @Autor: solid
 * @Date: 2022-09-19 14:14:12
 * @LastEditors: solid
 * @LastEditTime: 2022-09-19 14:27:53
 */

var (
	DB *gorm.DB
)

// InitMysql 初始化MySQL
func InitMysql(dataSource string) {
	fmt.Println("init mysql")
	var err error
	DB, err = gorm.Open("mysql", dataSource)
	if err != nil {
		panic(err)
	}
	//允许单表创建
	DB.SingularTable(true)
	//关闭sql语句日志
	DB.LogMode(false)
	DB.DB().SetMaxIdleConns(10)
	DB.DB().SetMaxOpenConns(100)
	// SetConnMaxLifetiment 设置连接的最大可复用时间。
	DB.DB().SetConnMaxLifetime(time.Hour)
	//数据库迁移
	DB.AutoMigrate(&Student{}, &Teacher{})
	fmt.Println("init mysql ok")
}

type Student struct {
	ID          int    `gorm:"primaryKey;column:id" json:"id"`
	Name        string `gorm:"column:name" json:"total"`
	Class       string `gorm:"column:class" json:"class"`
	TeacherName string `gorm:"column:teacher_name" json:"teacher_name"`
	Note        string `gorm:"column:note;type:longtext" json:"note"`
}
type Teacher struct {
	ID    int    `gorm:"primaryKey;column:id" json:"id"`
	Name  string `gorm:"column:name" json:"total"`
	Class string `gorm:"column:class" json:"class"`
	Note  string `gorm:"column:note;type:longtext" json:"note"`
}

func main() {
	//初始化数据库
	InitMysql("root:123456@tcp(127.0.0.1:3306)/test?charset=utf8mb4&parseTime=True")

}

Gorm常见单表操作

添加

package main

import (
	"fmt"
	"time"

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

var (
	DB *gorm.DB
)

// InitMysql 初始化MySQL
func InitMysql(dataSource string) {
	fmt.Println("init mysql")
	var err error
	DB, err = gorm.Open("mysql", dataSource)
	if err != nil {
		panic(err)
	}
	//允许单表创建
	DB.SingularTable(true)
	//关闭sql语句日志
	DB.LogMode(false)
	DB.DB().SetMaxIdleConns(10)
	DB.DB().SetMaxOpenConns(100)
	// SetConnMaxLifetiment 设置连接的最大可复用时间。
	DB.DB().SetConnMaxLifetime(time.Hour)
	//数据库迁移
	DB.AutoMigrate(&Student{}, &Teacher{})
	fmt.Println("init mysql ok")
}

type Student struct {
	ID          int    `gorm:"primaryKey;column:id" json:"id"`
	Name        string `gorm:"column:name" json:"total"`
	Class       string `gorm:"column:class" json:"class"`
	TeacherName string `gorm:"column:teacher_name" json:"teacher_name"`
	Note        string `gorm:"column:note;type:longtext" json:"note"`
}
type Teacher struct {
	ID    int    `gorm:"primaryKey;column:id" json:"id"`
	Name  string `gorm:"column:name" json:"total"`
	Class string `gorm:"column:class" json:"class"`
	Note  string `gorm:"column:note;type:longtext" json:"note"`
}

func main() {
	//初始化数据库
	InitMysql("root:123456@tcp(127.0.0.1:3306)/test?charset=utf8mb4&parseTime=True")
	stu := &Student{
		Name:        "张三",
		Class:       "数学",
		TeacherName: "李老师",
		Note:        "张三很喜欢数学",
	}
	res := DB.Model(Student{}).Create(stu)
	if res.Error != nil {
		fmt.Println(res.Error)
		return
	}
	fmt.Println("添加成功")
}