Step 3: Pass the data structure to Class::DBI::DataMigration::Migrator

• Migrating game genres into game types is straightforward
• (like example 1; "left for the reader")

• Then, migrating the games and the genre/type relationship will Just Work with exactly the same script code as before:

use Class::DBI::DataMigration::Migrator;
use Legacy::DBI::Games;
use New::DBI::Game;

open YAML, 'config.yaml' or die $!;
my $migrator = new Class::DBI::DataMigration::Migrator(join '', <YAML>);

my @source_objects = Legacy::DBI::Games->retrieve_all;
my $target_objects = $migrator->migrate_objects(\@source_objs);

# Now $target_objects point at the right game_types