littleshop/LittleShop/Models/ProductVariant.cs

using System.ComponentModel.DataAnnotations;
using LittleShop.Enums;

namespace LittleShop.Models;

public class ProductVariant
{
    [Key]
    public Guid Id { get; set; }

    public Guid ProductId { get; set; }

    [Required]
    [StringLength(100)]
    public string Name { get; set; } = string.Empty; // e.g., "Red", "Blue", "Vanilla", "Chocolate"

    [StringLength(50)]
    public string VariantType { get; set; } = "Standard"; // e.g., "Color", "Flavor", "Size", "Standard"

    public int SortOrder { get; set; } = 0; // For controlling display order

    public bool IsActive { get; set; } = true;

    public int StockLevel { get; set; } = 0; // Optional: track stock per variant

    public decimal? Weight { get; set; } // Optional: override product weight for this variant

    public ProductWeightUnit? WeightUnit { get; set; } // Optional: override product weight unit for this variant

    public decimal? Price { get; set; } // Optional: override product price for this variant (if null, uses product.Price)

    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;

    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;

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