golang使用gorm操作mysql3，数据查询

1.

	//GET请求 db操作，按id查询数据
	r.GET("/getByIdDb", controller.GetUserById)

	//GET请求 db操作，查询数据
	r.GET("/getByUserList", controller.GetByUserList)

2.

//getByUserId
func GetUserById(context *gin.Context) {
	user := &User{}
	context.BindJSON(&user)
	viewUser := dao.GetUserById(user.UserId)
	ReturnSucess(context, 200, "查询成功", viewUser, 1)
}

func GetByUserList(context *gin.Context) {
	list := dao.GetUserByList()
	i := len(list)
	fmt.Print(i)
	ReturnSucess(context, 200, "查询成功", list, int64(len(list)))
}

3.

func GetUserById(id int) User {
	var user User
	err := config.DB.Where("user_id = ?", id).First(&user).Error
	if err != nil {
		log.Println("查询用户失败，原因：", err)
	}
	return user
}

func GetUserByList() []*User {
	//申明一个数组
	var userList []*User
	err := config.DB.Find(&userList).Error
	//err := config.DB.Where("1 = ?", 1).Statement.Error
	if err != nil {
		log.Println("查询用户失败，原因：", err)
	}
	return userList
}

4.测试