BusStationSystem

public class TicketConfiguration : IEntityTypeConfiguration<Ticket>
    {
        public void Configure(EntityTypeBuilder<Ticket> builder)
        {

            //Each ticket is bought from a customer for a certain trip. ??


            builder.HasKey(t => new { t.TicketId, t.CustomerId, t.TripId });

            builder.HasOne(c => c.Customer)
                .WithOne(t => t.Ticket)
                .HasForeignKey<Ticket>(ct => ct.CustomerId)
                .OnDelete(DeleteBehavior.Restrict);

            builder.HasOne(tr => tr.Trip)
                .WithOne(t => t.Ticket)
                .HasForeignKey<Ticket>(tr => tr.TripId)
                .OnDelete(DeleteBehavior.Restrict);
        }
    }


public class TripConfiguration : IEntityTypeConfiguration<Trip>
    {
        public void Configure(EntityTypeBuilder<Trip> builder)
        {
            //Every trip has an origin and a destination ???


            builder.HasKey(tr => tr.TripId);

            builder.HasOne(bc => bc.BusCompany)
                .WithMany(tr => tr.Trips)
                .HasForeignKey(bc => bc.BusCompanyId)
                .OnDelete(DeleteBehavior.Restrict);
        }
    }


public class BankAccountCongiguration : IEntityTypeConfiguration<BankAccount>
    {
        public void Configure(EntityTypeBuilder<BankAccount> builder)
        {
            //Bank account can be owned by one customer and each customer can own only one bank account. ??


            builder.HasKey(b => new { b.BankAccountId, b.CustomerId });

            builder.HasOne(c => c.Customer)
                .WithOne(b => b.BankAccount)
                .HasForeignKey<BankAccount>(c => c.CustomerId)
                .OnDelete(DeleteBehavior.Restrict);
        }
    }