source: StockMaster/Models/SaleItem.cs@ dfe03b8

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace StockMaster.Models
{
    [Table("sale_item", Schema = "stock_management")]
    public class SaleItem
    {
        [Column("sale_id")]
        public int SaleId { get; set; }

        [ForeignKey("SaleId")]
        public Sale Sale { get; set; }

        [Column("product_id")]
        public int ProductId { get; set; }

        [ForeignKey("ProductId")]
        public Product Product { get; set; }

        [Required(ErrorMessage = "Quantity is required")]
        [Range(1, int.MaxValue, ErrorMessage = "Quantity must be greater than 0")]
        [Column("quantity")]
        public int Quantity { get; set; }

        [Required(ErrorMessage = "Unit price is required")]
        [Range(0.01, double.MaxValue, ErrorMessage = "Unit price must be greater than 0")]
        [Column("unit_price_at_sale")]
        public decimal UnitPriceAtSale { get; set; }
    }
}