AjaxWithWebService.Models.DataContext.OnModelCreating C# (CSharp) Метод

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Artist>()
                .HasMany(e => e.Albums)
                .WithRequired(e => e.Artist)
                .WillCascadeOnDelete(false);

            modelBuilder.Entity<Customer>()
                .HasMany(e => e.Invoices)
                .WithRequired(e => e.Customer)
                .WillCascadeOnDelete(false);

            modelBuilder.Entity<Employee>()
                .HasMany(e => e.Customers)
                .WithOptional(e => e.Employee)
                .HasForeignKey(e => e.SupportRepId);

            modelBuilder.Entity<Employee>()
                .HasMany(e => e.Employee1)
                .WithOptional(e => e.Employee2)
                .HasForeignKey(e => e.ReportsTo);

            modelBuilder.Entity<Invoice>()
                .Property(e => e.Total)
                .HasPrecision(10, 2);

            modelBuilder.Entity<Invoice>()
                .HasMany(e => e.InvoiceLines)
                .WithRequired(e => e.Invoice)
                .WillCascadeOnDelete(false);

            modelBuilder.Entity<InvoiceLine>()
                .Property(e => e.UnitPrice)
                .HasPrecision(10, 2);

            modelBuilder.Entity<MediaType>()
                .HasMany(e => e.Tracks)
                .WithRequired(e => e.MediaType)
                .WillCascadeOnDelete(false);

            modelBuilder.Entity<Playlist>()
                .HasMany(e => e.Tracks)
                .WithMany(e => e.Playlists)
                .Map(m => m.ToTable("PlaylistTrack").MapLeftKey("PlaylistId").MapRightKey("TrackId"));

            modelBuilder.Entity<Track>()
                .Property(e => e.UnitPrice)
                .HasPrecision(10, 2);

            modelBuilder.Entity<Track>()
                .HasMany(e => e.InvoiceLines)
                .WithRequired(e => e.Track)
                .WillCascadeOnDelete(false);
        }
    }