func main() {
	db, err := gorm.Open("sqlite3", "test.db")
	if err != nil {
		panic("failed to connect database")
	}
	defer db.Close()

	gorm.AddNamingStrategy(&gorm.NamingStrategy{
		DB: func(name string) string {
			return "db_" + name
		},
		Table: func(name string) string {
			return "table_" + name
		},
		Column: func(name string) string {
			return "col_" + name
		},
	})

	db.AutoMigrate(&Product{})
}