blob: 48bb851e62c0c6e75b5377bdcf1418f259ca3a27 (
plain) (
tree)
|
|
# This class models a vertex in a directed graph.
class Vertex < ActiveRecord::Base
has_many :sink_edges, :class_name => 'Edge', :foreign_key => 'source_id'
has_many :sinks, :through => :sink_edges
has_and_belongs_to_many :sources,
:class_name => 'Vertex', :join_table => 'edges',
:foreign_key => 'sink_id', :association_foreign_key => 'source_id'
end
|