Gorm Updates cant auto set updated_at when strcut dont have Updated_at field.

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https://github.com/go-gorm/playground/pull/761

Description

package main

import (
    "log"

    "github.com/gogf/gf/v2/util/grand"
    "gorm.io/driver/mysql"
    "gorm.io/gorm"
)

type Route struct {
    ID        uint `gorm:"primarykey"`
    CreatedAt int64
    UpdatedAt int64
    Name      string
}
type Update struct {
    Name      string
    UpdatedAt int64
}
type NoUpdate struct {
    Name string
}

func main() {
    // 连接到 MySQL 数据库
    dsn := "root:xxxx@tcp(xxxx:3306)/xxxx?charset=utf8mb4&parseTime=True&loc=Local"
    db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
    if err != nil {
        log.Fatalf("failed to connect database: %v", err)
    }

    var route = &Route{}
    // 使用 Updates 方法更新 Route
    //[7.219ms] [rows:1] UPDATE `routes` SET `updated_at`=1728225917,`name`='KgqHaJnfID' WHERE `id` = 5
    result := db.Model(&route).Debug().Where("id", 5).Updates(Route{Name: grand.Letters(10)})
    if result.Error != nil {
        log.Fatalf("failed to update route: %v", result.Error)
    }
    //[8.108ms] [rows:1] UPDATE `routes` SET `updated_at`=1728225917,`name`='zPrQbQopwm' WHERE `id` = 5
    result = db.Model(&route).Debug().Where("id", 5).Updates(Update{Name: grand.Letters(10)})
    if result.Error != nil {
        log.Fatalf("failed to update route: %v", result.Error)
    }
        // 这里 如果 NoUpdate 没有 UpdatedAt 时将不会自动更新 updated_at 但是 转成map后是正常可以的 （即使没有uodated_at字段）
    //[7.656ms] [rows:1] UPDATE `routes` SET `name`='NkGiUbrINK' WHERE `id` = 5
    result = db.Model(&route).Debug().Where("id", 5).Updates(NoUpdate{Name: grand.Letters(10)})
    if result.Error != nil {
        log.Fatalf("failed to update route: %v", result.Error)
    }
}

Comment From: Mghasemzadeh

Hi, I am working on it.

Comment From: Mghasemzadeh

Hi again, I’m currently working on this issue. I’ve successfully reproduced the problem and identified the specific section of the code that’s causing it. I’m now focusing on finding a solution

Comment From: Mghasemzadeh

Hi,

You should change the struct field type to time.Time and use the gorm:"autoCreateTime" annotation for automatic handling of the created_at field, and gorm:"autoUpdateTime" for the updated_at field. This ensures that GORM automatically manages the timestamps during record creation and updates. Additionally, make sure that the corresponding database columns are of type TIMESTAMP. Changing the field type to time.Time in your Go struct will ensure that GORM properly maps these fields to MySQL's TIMESTAMP data type, allowing for correct storage and automatic timestamp handling without manual intervention.

@hinego

Comment From: Mghasemzadeh

Hi @jinzhu,

I've investigated this issue and found that it’s not valid as described. The current functionality meets the expected behavior, and no changes are necessary at this time. So, I recommend closing the issue.

Comment From: WUYONGGANG

哥 能不能探讨一下 更好了实现gorm-gen 结构体转查询语句的方案呀？

Comment From: WUYONGGANG

想联系你 不知道怎么联系 谢谢 @hinego