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Doing a has_and_belongs_to_many against a single table (See related posts)

Found via the RoR wiki. Solution courtesy of Jakob S.

Assuming a schema like such:

create table node (
  id integer primary key,
  name varchar(32)
);

create table nodelink (
  source_id integer,
  destination_id integer
);


A Rails association like this would supposedly do the job:

has_and_belongs_to_many :nodes, :join_table => 'nodelink', :association_foreign_key => 'destination_id', :foreign_key => 'source_id'
to rails rubyonrails relationships habtm associations by peter on Sat May 14 05:44:21 -0400 2005

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