protected override void OnModelCreating(ModelBuilder modelBuilder)
{
int countSize = 1000;
modelBuilder.Entity <Position>().HasData(InitDb.GetPositions(countSize));
modelBuilder.Entity <Staff>().HasData(InitDb.GetStaffs(countSize));
modelBuilder.Entity <TypeAirplane>().HasData(InitDb.GetTypeAirplanes(countSize));
modelBuilder.Entity <Airplane>().HasData(InitDb.GetAirplanes(countSize));
modelBuilder.Entity <JobAirplane>().HasData(InitDb.GetJobAirplanes(countSize));
modelBuilder.Entity <Flight>().HasData(InitDb.GetFlights(countSize));
modelBuilder.Entity <Ticket>().HasData(InitDb.GetTickets(countSize));
}