Gorm POSTGRESQL：Has Many关联时候，在重写ID生成函数的时候，再有多个子项的时候ID只生成一个

type CommonModel struct {

    // ID UUID as database index
    ID        string `gorm:"primary_key"`
    CreatedAt time.Time
    UpdatedAt time.Time
}

// Credential database model
type User struct {
    CommonModel
    AppName              string
    Type                 int8
    Data                 datatypes.JSON
    Card              []Card `gorm:"foreignKey:UserID"`
}

type Card struct {
    CommonModel
    Name                      string
        UserID                 string
    Data                      datatypes.JSON
}

已经跳用了注册函数：

func registerCallback(db *gorm.DB) {
    // auto add uuid
    err := db.Callback().Create().Before("gorm:create").Register("uuid", func(db *gorm.DB) {
        db.Statement.SetColumn("id", NewUUID())
    })

    if err != nil {
        panic(err)
    }
}

当User中含有多个Card的时候，只有第一个card会自动生成ID，其他的均为空 在调用Create(&user)的时候，使用的数据库为Postgres

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Comment From: a631807682

https://gorm.io/docs/create.html#Batch-Insert create multiple record hook methods only invoked once

func (u *CommonModel) BeforeCreate(tx *gorm.DB) (err error) {
    u.ID = NewUUID()
    return
}