+__PACKAGE__->configure_acts_as_list(group_by => [qw(trans_id)]);
+
+__PACKAGE__->meta->add_relationships(
+ invoice => {
+ type => 'one to one',
+ class => 'SL::DB::Invoice',
+ column_map => { trans_id => 'id' },
+ },
+
+ purchase_invoice => {
+ type => 'one to one',
+ class => 'SL::DB::PurchaseInvoice',
+ column_map => { trans_id => 'id' },
+ },
+);
+