gistfile1.rb

# testneo.rb
require 'rubygems'
require 'neo4j'

NEO4J_STORAGE = File.dirname(__FILE__)+'/db/neo4j'
LUCENE_STORAGE = File.dirname(__FILE__)+'/db/lucene'

Neo4j::Config[:storage_path] = NEO4J_STORAGE
Lucene::Config[:store_on_file] = true
Lucene::Config[:storage_path] = LUCENE_STORAGE 

FileUtils.rm_rf NEO4J_STORAGE
FileUtils.rm_rf LUCENE_STORAGE 

class NeoLang
  include Neo4j::NodeMixin
  property :code, :name, :available
  index :code, :tokenized => true
  index :name, :tokenized => true
  index :available, :tokenized => true
  def to_s
    "#{self.code}(#{self.name})"
  end
end

Neo4j.start

Neo4j::Transaction.run do
  node = NeoLang.new
  node.code = 'en'
  node.name = "English"
  node.available = 1

  node = NeoLang.new
  node.code = 'it'
  node.name = "Italian"
  node.available = 1
end

Neo4j::Transaction.run do
  NeoLang.find(:available=>1).each{|o|puts o}
  # => en(English)
  # => it(Italian)
  p NeoLang.find(:code=>'it').first
  # => nil .............................. WTF?
  puts NeoLang.find(:code=>'en').first
  # => en(English)       
  puts '--'
  
  # again, with Lucene DSL:
  
  NeoLang.find('available:1').each{|o|puts o}
  # => en(English)
  # => it(Italian)
  p NeoLang.find('code:it').first
  # => nil .............................. WTF?
  puts NeoLang.find('code:en').first
  # => en(English)       
  
end

Neo4j.stop

=begin
MacBook Pro, Mac OS-X 2.6.1, used Lucene 2.4.0, but also tested with Lucene 2.9.0

$ uname -a
Darwin MacBook-Pro-15-admin.local 10.0.0 Darwin Kernel Version 10.0.0: Fri Jul 31 22:47:34 PDT 2009; root:xnu-1456.1.25~1/RELEASE_I386 i386

$ java -version
java version "1.6.0_15"
Java(TM) SE Runtime Environment (build 1.6.0_15-b03-219)
Java HotSpot(TM) 64-Bit Server VM (build 14.1-b02-90, mixed mode)

$ jruby -v
jruby 1.4.0RC1 (ruby 1.8.7 patchlevel 174) (2009-10-06 6586) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_15) [x86_64-java]

$ jruby -S gem list neo4j
neo4j (0.3.2)

$ jruby testneo.rb 
en(English)
it(Italian)
nil
en(English)
--
en(English)
it(Italian)
nil
en(English)
=end

# ANOTHER TRY:

#!/opt/jruby/bin/jruby
require 'rubygems'
require 'neo4j'

NEO4J_STORAGE = File.dirname(__FILE__)+'/db/neo4j'
LUCENE_STORAGE = File.dirname(__FILE__)+'/db/lucene'

Neo4j::Config[:storage_path] = NEO4J_STORAGE
Lucene::Config[:store_on_file] = true
Lucene::Config[:storage_path] = LUCENE_STORAGE 
FileUtils.rm_rf NEO4J_STORAGE
FileUtils.rm_rf LUCENE_STORAGE

class NeoLang
  include Neo4j::NodeMixin
  property :code
  index :code
  def to_s
    "#{self.code}"
  end
end

Neo4j.start

@langs = %w(en at ut ti it id)       

Neo4j::Transaction.run do   
  @langs.each do |lang|
    node = NeoLang.new
    node.code = lang
  end
end    
       
Neo4j::Transaction.run do
  puts "Try1:"
  @langs.each do |lang|  
    puts "#{lang} -> #{NeoLang.find(:code=>lang).first.to_s}" 
  end  
  puts "Try2:"
  @langs.each do |lang|  
    puts "#{lang} -> #{NeoLang.find('code:'+lang).first.to_s}" 
  end     
end      

Neo4j.stop    

=begin      
Result: 

Try1:
en -> en
at -> at
ut -> ut
ti -> ti
it -> it
id -> id
Try2:
en -> en
at -> 
ut -> ut
ti -> ti
it -> 
id -> id
=end