redisgraph

redisgraph-rb

redisgraph-rb is a Ruby gem client for the RedisGraph module. It relies on redis-rb for Redis connection management and provides support for graph QUERY, EXPLAIN, and DELETE commands.

RedisGraph compatibility

The current version of redisgraph-rb is compatible with RedisGraph versions >= 1.99 (module version: 19900).

Previous Version

For RedisGraph versions >= 1.0 and < 2.0 (ie module version: 10202), instead use and refer to the redisgraph gem version ~> 1.0.0

which corresponds to the following docker image docker run -p 6379:6379 -it --rm redislabs/redisgraph:1.2.2

Installation

To install, run:

$ gem install redisgraph

Or include redisgraph as a dependency in your Gemfile.

Usage

require 'redisgraph'

graphname = "sample"

r = RedisGraph.new(graphname)

cmd = """CREATE (:person {name: 'Jim', age: 29})-[:works]->(:employer {name: 'Dunder Mifflin'})"""
response = r.query(cmd)
response.stats
 => {:labels_added=>2, :nodes_created=>2, :properties_set=>3, :relationships_created=>1, :internal_execution_time=>0.705541}

cmd = """MATCH ()-[:works]->(e:employer) RETURN e"""

response = r.query(cmd)

response.print_resultset
--------------------------------
| e                            |
--------------------------------
| [{"name"=>"Dunder Mifflin"}] |
--------------------------------

r.delete
 => "Graph removed, internal execution time: 0.416024 milliseconds"

Specifying Redis options

RedisGraph connects to an active Redis server, defaulting to host: localhost, port: 6379. To provide custom connection parameters, instantiate a RedisGraph object with a redis_options hash:

r = RedisGraph.new("graphname", redis_options= { host: "127.0.0.1", port: 26380 })

These parameters are described fully in the documentation for https://github.com/redis/redis-rb

Running tests

To ensure prerequisites are installed, run the following: bundle install

These tests expect a Redis server with the Graph module loaded to be available at localhost:6379

The currently compatible version of the RedisGraph module may be run as follows: docker run -p 6379:6379 -it --rm redislabs/redisgraph:2.0-edge

A simple test suite is provided, and can be run with: rspec