Neo4r

Neo4r is an Active Model compliant Ruby wrapper for the Neo4j graph database. It uses the Neography gems.

Requirement

• ruby ~> 2.1
• neography ~> 1.6

Neo4j version support

• 2.0.x
• 2.1.x

Installation

Add this line to your application's Gemfile:

gem 'neo4r'

And then execute:

$ bundle

Or install it yourself as:

$ gem install neo4r

Usage

Configuration

Neo4r uses Neography to handle Neo4j REST API. So the configuration is same with Neography. Please see the Neography document.

Modeling

A sample Node model.

class User < Neo4r::Node
end

Create a new node.

user = User.new
user.name = "hiroponz"
user.mail = "hiroponz@example.com"
user.age = 35
user.save # => true

Search nodes. The syntax of an exact match is only implemented.

users = User.where(name: "hiroponz")
puts users.first.name # => "hiroponz"

Update nodes.

user = User.where(name: "hiroponz").first
user.age = 36
user.save # => true

Delete nodes.

user = User.where(name: "hiroponz").first
user.destroy => true

Add connection.

zakuni = User.new
zakuni.name = "zakuni"
zakuni.save

hiroponz = User.new
hiroponz.name = "hiroponz"
hiroponz.save

hryk = User.new
hryk.name = "hryk"
hryk.save

suga = User.new
suga.name = "suga"
suga.save

hryk.incoming(:boss) << zakuni
hryk.incoming(:boss) << hiroponz
suga.incoming(:boss) << hryk

Traverse connection.

suga.incoming(:boss).each { |user| puts user.name }
# output
# => "hryk"
suga.incoming(:boss).depth(:all).each { |user| puts user.name }
# output
# => "hryk"
# => "hiroponz"
# => "zakuni"

Delete connection.

hryk.rels(:boss).to_other(hiroponz).destroy

Contributing

1. Fork it ( https://github.com/hiroponz/neo4r/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request