Gorm db.Save 方法存在数据的情况修改时会将 'created_at' 修改成 '0000-00-00 00:00:00'

GORM Playground Link

https://github.com/go-gorm/playground/pull/1

Description

在结构体中添加某个主键，使用db.Save方法修改时，第一次成功创建数据，第二次的时候将created_at字段数据改为了'0000-00-00 00:00:00'

type TwelveHoursActivityMemberSetting struct {
    MemberUuid            string         `gorm:"primaryKey" json:"member_uuid"`
    TwelveHoursActivityId int            `json:"twelve_hours_activity_id"`
    Numbers               int            `json:"numbers"`
    TotalQuantity         int            `json:"total_quantity"`
    IsMyResolve           int            `json:"is_my_resolve"`
    IsCalendar            int            `json:"is_calendar"`
    Weekly                datatypes.JSON `json:"weekly"`
    ReminderTime          datatypes.JSON `json:"reminder_time"`
    CreatedAt             time.Time      `json:"created_at"`
    UpdatedAt             time.Time      `json:"updated_at"`
}

twelveHoursActivityMemberSettingMap := models.TwelveHoursActivityMemberSetting{
        MemberUuid:            authUser.Uuid,
        TwelveHoursActivityId: twelveHoursActivity.Id,
        Numbers:               data.Numbers,
        IsMyResolve:           0,
        IsCalendar:            data.IsCalendar,
        Weekly:                weekly,
        ReminderTime:          reminderTime,
}
db = common.Db.Save(&twelveHoursActivityMemberSettingMap)

后面两个时间分别是，created_at和updated_at 第一次执行结果

07af18e1-0987-4d6b-9679-c1a3ec6c3eb3    1   8   0   0   0   ["1", "2"]  ["07:45", "20:00"]  2021-06-03 16:41:33 2021-06-03 16:41:33

第二次执行结果

07af18e1-0987-4d6b-9679-c1a3ec6c3eb3    1   8   0   0   0   ["1", "2"]  ["07:45", "20:00"]  0000-00-00 00:00:00 2021-06-03 16:43:35

Comment From: github-actions[bot]

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Comment From: tommiyxu

@XuruiPro created_at更新变0 这个怎么处理的？翻了半天issues都没找到 :-(

Comment From: tc7326

Model { CreatedAt time.Time gorm:"<-:create" // Allow reading and creation }