littleshop/LittleShop/Models/OrderItem.cs

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

namespace LittleShop.Models;

public class OrderItem
{
    [Key]
    public Guid Id { get; set; }
    
    public Guid OrderId { get; set; }
    
    public Guid ProductId { get; set; }

    public Guid? ProductMultiBuyId { get; set; } // Nullable for backward compatibility

    [StringLength(100)]
    public string? SelectedVariant { get; set; } // The variant chosen (e.g., "Red", "Vanilla")

    public int Quantity { get; set; }

    [Column(TypeName = "decimal(18,2)")]
    public decimal UnitPrice { get; set; }

    [Column(TypeName = "decimal(18,2)")]
    public decimal TotalPrice { get; set; }

    // Navigation properties
    public virtual Order Order { get; set; } = null!;
    public virtual Product Product { get; set; } = null!;
    public virtual ProductMultiBuy? ProductMultiBuy { get; set; }
}