private bool UpsertEvent(EventAdministrationViewModel viewModel, VenueModel venueModelForConcert, PerformerModel artistFromDb)
        {
            // Add event if it doesn't exist
            const ServerTargetEnum saveToShardDb = ServerTargetEnum.Primary;
            var eventDateTime = new DateTime(viewModel.Year, viewModel.Month, viewModel.Day, 20, 0, 0);

            if (_concertRepository.SaveNewConcert(viewModel.NewEvent, viewModel.Description, eventDateTime, saveToShardDb, venueModelForConcert.VenueId, artistFromDb.PerformerId) == null)
            {
                DisplayMessage(String.Format(" Failed to add new concert event. \'{0}\'", viewModel.NewEvent));
                return(false);
            }

            DisplayMessage(string.Format("Successfully added new event {0}.", viewModel.NewEvent));
            return(true);
        }