our %states = (
          AL => 'Alabama',
          AK => 'Alaska',
          ...
        );
        ...
        state => sub {return 'state' => $states{$_[1]->{_content}}; }

 or

        address => sub {
                if (exists $_[1]->{id}) {
                        $sthFetchAddress->execute($_[1]->{id});
                        my $addr = $sthFetchAddress->fetchrow_hashref();
                        $sthFetchAddress->finish();
                        return 'address' => $addr;
                } else {
                        return 'address' => $_[1];
                }
        }