See https://metacpan.org/release/RIBASUSHI/DBIx-Class-0.08270/view/lib/DBIx/Class/Manual/Cookbook.pod#Grouping-results. Something like: 
my $rs = $schema->resultset('Events')->search(
  {},
  {
    select   => [ 'name', { max => 'event_id' } ],
    as       => [qw/ name max_event_id /],
    group_by => [qw/ name /]
  }
);

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In reply to Re^2: MAX and GROUP BY in DBIx::Class by ysth
in thread MAX and GROUP BY in DBIx::Class by Anonymous Monk

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