retroactively add polylines to non-polyline journeys

	}

	$tx->commit;

	# Add estimated polylines to journeys logged before 2020-01-28

	$tx = $db->begin;

	say 'Adding polylines to journeys logged before 2020-01-28';

	my $no_polyline

	  = $db->select( 'journeys', 'count(*) as count', { polyline_id => undef } )

	  ->hash;

	say "Checking $no_polyline->{count} journeys ...";

	for my $journey (

		$db->select( 'journeys', [ 'id', 'route' ], { polyline_id => undef } )

		->hashes->each )

	{

		my $ref = $db->select(

			'journeys',

			[ 'id', 'polyline_id' ],

			{

				route       => $journey->{route},

				polyline_id => { '!=', undef }

			},

			{ limit => 1 }

		)->hash;

		if ($ref) {

			my $rows = $db->update(

				'journeys',

				{ polyline_id => $ref->{polyline_id} },

				{ id          => $journey->{id} }

			)->rows;

			if ( $rows != 1 ) {

				say STDERR

"Database update returned $rows rows, expected 1. Rollback and abort.";

				exit(1);

			}

		}

	}

	my $remaining

	  = $db->select( 'journeys', 'count(*) as count', { polyline_id => undef } )

	  ->hash;

	say "Done! Remaining journeys without polyline: " . $remaining->{count};

	$tx->commit;

}

1;