Neo4j-wrapper

This contains the Ruby wrapper of the Neo4j::Node and Neo4j::Relationship java object defined in the neo4j-core gem. This gem is included in neo4j.

Docs

The public API

Neo4j::NodeMixin The Java Neo4j Node

Neo4j::RelationshipMixin The Java Relationship

Neo4j::IdentityMap The Identity Map (should be disabled for batch imports and Rake scripts)

Example

class Company
  include Neo4j::NodeMixin
  has_n(:employees)
end

class Person
  include Neo4j::NodeMixin
  property :name
  property :age, :size, :type => Fixnum, :index => :exact
  property :description, :index => :fulltext

  has_one(:best_friend)
  has_n(:employed_by).from(:employees)
end

Neo4j::Transaction.run do
  Person.new(:name => 'jimmy', :age => 35)
end

person = Person.find(:age => (10..42)).first

Neo4j::Transaction.run do
  person.best_friend = Person.new
  person.employed_by << Company.new(:name => "Foo ab")
end

# find by navigate incoming relationship
company = person.employed_by.find { |p| p[:name] == 'Foo ab' }
puts "Person #{person.name} employed by #{company[:name]}"
# navigate the outgoing relationship:
company.employees.each {|x| puts x.name}

Changes

Changes from the neo4j.rb

  • Use of YARD instead of RDoc

  • Some tidy up of the API and code

  • Change of Ruby module structure.

  • More RSpecs and more use of mocking combined with real testing of the Java layer

  • Make sure that we retrieve relationships and nodes lazy if possible.

This gem contains two modules: Neo4j and Neo4j::Wrapper The Neo4j module is public and the Neo4j::Wrapper(::*) are private modules.

License

Notice there are different license for the neo4j-community, neo4j-advanced and neo4j-enterprise jar gems. Only the neo4j-community gem is by default required.