gistfile1.txt

$LOAD_PATH << './lib'
require "lib/neo4j"
require "rubygems"
require "ruby-debug"

class Person
  include Neo4j::NodeMixin

  # define Neo4j properties
  property :name

  # define an one way relationship to any other node
  has_n :friends
  has_one :loves  # only one in this monogamic model
  has_n :has_coded

  # adds a Lucene index on the following properties
  index :name

  # hook method in initialize
  # allows us to use more compact property setting
  # like  neo = Person.new(:name => 'Neos')
  def init_node(*args)
    (properties = args.first).is_a?(Hash) ? properties.each{ |k, v| self[k] = v } : nil
  end
end

Neo4j::Transaction.run do

  neo = Person.new(:name => 'Neo')       # using init_node hook here
  morpheus = Person.new(:name => 'Morpheus')
  trinity = Person.new(:name => 'Trinity')

  cypher = Person.new
  cypher.name = 'Cypher'
  cypher.friends << morpheus

  smith = Person.new
  smith.name = 'Agent Smith'

  architect = Person.new
  architect.name = 'Architect'

  neo.friends << morpheus
  morpheus.friends << trinity
  cypher.friends << smith

  trinity.loves = neo
  architect.has_coded << smith
  # or architect.rels.outgoing(:has_coded) << smith

  # find Neo's friends
  neo.friends.each { |n| puts 'Friend: ' + n.name }

  # Neo's friends of friends
  neo.friends.depth(2).each { |n| puts 'FOAF: ' + n.name }


  # architect.traverse.both(:friends, :loves, :has_coded).depth(:all).filter do
  architect.traverse.both(*Person.relationships_info.keys).depth(:all).filter do
    outgoing(:loves).to_a.any?
    # loves.to_a.any?  # nicer and works also, but throws warning: default 'to_a' will be obsolete
  end.each do |n|
    puts n.name + ' loves ' + n.outgoing(:loves).to_a.first.name
  end

end