Oh glorious and incredibly patient fellow monks, can anybody please enlighten me how to add a method to a ResultSet class in DBIx::Class?

package ThreadedDB::Article;

use strict;
use warnings;

use base 'DBIx::Class';

__PACKAGE__->load_components("Core");
__PACKAGE__->table("article");
__PACKAGE__->add_columns(
  "id",
  { data_type => "INT", default_value => undef, is_nullable => 0, size
+ => 11 },
# etc, etc, etc
);
__PACKAGE__->set_primary_key("id");
__PACKAGE__->has_many(
  "article_texts",
  "ThreadedDB::ArticleText",
  { "foreign.article" => "self.id" },
);

# Created by DBIx::Class::Schema::Loader v0.04004 @ 2008-01-03 18:12:1
+2
# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:Y0WFrRSlgOqaz/fbhRt98A

#package ThreadedDB::Article::ResultSet;
#use base 'DBIx::Class::ResultSet';
sub insert_article {
  my ($self, $topic, $parent, $msgtext) = @_;

  my $articles = $self->resultset('Article');
  eval {
    $self->txn_do
      (sub
       {
# a complex operation that is not relevant yet
       })
  };
}
1;
[download]

In other words, I'd like to find a way to put a method into the Article.pm file in such a way that I could access it by doing $schema->resultset('Article')->insert_article(...)

I've tried directly declaring the class (as commented out, above) but it didn't work. Either I'm misunderstanding what the resulting class should be called, or I'm misunderstanding something else.

I did read Re^2: [DBIX::Class] problem with Arbitrary SQL through a custom ResultSource, but it didn't help since the method I need contains a bunch of code (not all of which can be in SQL), and all of which should be done inside a transaction.

I'd be grateful for any pointers...