I have launched my website in beta-version. The next version should contain a shopping cart and a checkout with the credit card. On my way to making this shopping cart, I've discovered that my old Product-class with several different prices simply doesn't work. I need one price with one identity or a subclass with several prices mapped to the original class(which I will use) :
public class Product { [Key] public int ProductID { get; set; } [Required(ErrorMessage = "Please enter an product name")] public string Name { get; set; } [Required(ErrorMessage = "Please specify a category")] public string Category { get; set; } public string SubCategory { get; set; } public string Description { get; set; } public decimal Price16 { get; set; } public decimal Price12 { get; set; } public decimal Price8 { get; set; } public decimal Price4 { get; set; } public decimal PriceEach { get; set; } public decimal PriceKg { get; set; } public string ProductImageSmallUrl { get; set; } public string ProductImageSmallAlternativeDescription { get; set; } public string ProductImageSmallContentType { get; set; } public string ProductImageLargeUrl { get; set; } public string ProductImageLargeAlternativeDescription { get; set; } public string ProductImageLargeContentType { get; set; } public string ProductImageLargeSecondUrl { get; set; } public string ProductImageLargeSecondAlternativeDescription { get; set; } public string ProductImageLargeSecondContentType { get; set; } } I have after, a lot of research constructed two classes:
public class Product { public Product(ICollection<Price> prices) { Prices = prices; } [Key] public int ProductID { get; set; } [Required(ErrorMessage = "Please enter an product name")] public string Name { get; set; } [Required(ErrorMessage = "Please specify a category")] public string Category { get; set; } public string SubCategory { get; set; } public string Description { get; set; } public string ProductImageSmallUrl { get; set; } public string ProductImageSmallAlternativeDescription { get; set; } public string ProductImageSmallContentType { get; set; } public string ProductImageLargeUrl { get; set; } public string ProductImageLargeAlternativeDescription { get; set; } public string ProductImageLargeContentType { get; set; } public string ProductImageLargeSecondUrl { get; set; } public string ProductImageLargeSecondAlternativeDescription { get; set; } public string ProductImageLargeSecondContentType { get; set; } public ICollection<Price> Prices { get; set; } } And a price class: public class Price { [Key] public int ID { get; set; } public int CurrentProductID { get; set; } public string Size { get; set; } public decimal Value { get; set; } public Product CurrentProduct { get; set; } } I have this DbContext:
public class ApplicationDbContext : DbContext { public ApplicationDbContext(DbContextOptions<MokaMokkaDbContext> options) :base(options) {} public DbSet<Product> Products { get; set; } public DbSet<Price> Prices { get; set; } protected override void OnModelCreating (ModelBuilder modelBuilder) { modelBuilder.Entity<Price>() .HasOne(p => p.CurrentProduct) .WithMany(b => b.Prices) .HasForeignKey(p => p.CurrentProductID); } } I am trying to write a seeding class:
public class SeedData { public static EnsurePopulated(IApplicationBuilder app) { MokaMokkaDbContext context = app.ApplicationServices .GetRequiredService<MokaMokkaDbContext>(); context.Database.Migrate(); if(!context.Products.Any()) { context.Products.AddRange( new Product { Name = "Dobos cake", Category = "Cake", ProductImageSmallUrl = "Dobos.Torta.jpg", ProductImageSmallContentType = "jpg", Prices = new List<Price>() }); } } But I get the following problem in over the red underline of the Product I am trying to create: "There is no argument given that corresponds to the required formal parameter "prices" of Product.Product(ICollection)".
