Defining models

type Product struct {
    Id              *int            `db:"id"`
    ProductName     string          `db:"product_name"`
    Description     string          `db:"description"`
    Price           decimal.Decimal `db:"price"`
    Weight          float32         `db:"weight"`
    IsAvailable     bool            `db:"is_available"`
    ManufactureDate time.Time       `db:"manufacture_date"`
    AddedDateTime   time.Time       `db:"added_datetime"`
}