public async Task <IEnumerable <AirportType> > GetDestinations([Parent] AirlineType airline)
{
return(await Task.WhenAll(
(await _dataStore.FetchRoutesByAirlineAsync(airline.Id))
.Select(route => route.DestinationAirportId)
.Distinct()
.Select(async airportId =>
{
var airport = await _dataStore.GetAirportByIdAsync(airportId);
return _mapper.Map <AirportType>(airport);
})
));
}
public async Task <AirportType?> GetSource([Parent] RouteType route)
{
return(_mapper.Map <AirportType>(await _dataStore.GetAirportByIdAsync(route.SourceAirportId)));
}