package main import ( "time" "github.com/rs/xid" "gorm.io/gorm" ) // User User model type User struct { ID string `gorm:"primaryKey"` Email string LastLogin time.Time Products Product `gorm:"many2many:orders;"` ProfileID uint `gorm:"default:NULL"` Profile Profile CreatedAt time.Time UpdatedAt time.Time } type Profile struct { ID uint `gorm:"primaryKey"` Name string CreatedAt time.Time UpdatedAt time.Time } type Product struct { ID uint `gorm:"primaryKey"` Type string Name string Brief string Description string CreatedAt time.Time UpdatedAt time.Time } type Order struct { UserID string `gorm:"primaryKey"` ProductID uint `gorm:"primaryKey"` Price float32 CreatedAt time.Time UpdatedAt time.Time } // BeforeCreate set UID func (u *User) BeforeCreate(tx *gorm.DB) (err error) { if u.ID == "" { u.ID = xid.New().String() } u.LastLogin = time.Now() return }