C# EF 6如何使用多级include

如何使用包括3级及以上？

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只需要使用Include（）。将不使用延迟加载（查询时间过长）

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thenclude

ef6没有thenclude

var tickets = db.Tickets
                .Include(x => x.CreatedBy)
                .Include(x => x.Currency)
                .Include(x => x.DepartureTrips.Select(t => t.Trip))
                .Include(x => x.DepartureTrips.Select(t => t.Trip).Select(t => t.Carrier)) // ERROR 
                .Include(x => x.DepartureTrips.Select(t => t.Trip).Select(t => t.TripCities))
                .Include(x => x.DepartureTrips.Select(t => t.Number))
                .Include(x => x.DepartureTrips.Select(t => t.CityFrom))
                .Include(x => x.DepartureTrips.Select(t => t.CityTo))
                .Include(x => x.ReturnTrips.Select(t => t.Trip))
                .Include(x => x.ReturnTrips.Select(t => t.Trip).Select(t => t.Carrier))
                .Include(x => x.ReturnTrips.Select(t => t.Trip).Select(t => t.TripCities))
                .Include(x => x.ReturnTrips.Select(t => t.Number))
                .Include(x => x.ReturnTrips.Select(t => t.CityFrom))
                .Include(x => x.ReturnTrips.Select(t => t.CityTo))
                .AsNoTracking()
                .AsQueryable();