tx.Statement.SetColumn("Price", s.Price+10)
	}

	if tx.Statement.Changed("Code") {
		s.Price += 20
		tx.Statement.SetColumn("Price", s.Price+30)
	}
	return nil
}

func TestSetColumn(t *testing.T) {
	DB.Migrator().DropTable(&Product3{})
	DB.AutoMigrate(&Product3{})

	product := Product3{Name: "Product", Price: 0}
	DB.Create(&product)

	if product.Price != 100 {