Elasticsearch

This repository contains the official Elasticsearch Ruby client.

The elasticsearch gem is a complete Elasticsearch client which uses two separate libraries:

• elastic-transport - provides the low-level code for connecting to an Elasticsearch cluster.
• elasticsearch-api - provides a Ruby API for the Elasticsearch RESTful API.

Documentation

Please refer to the full documentation on elastic.co for comprehensive information.

Both elastic-transport and elasticsearch-api are also documented. You can check the elastic-transport and the elasticsearch-api documentation at RubyDocs.

Installation

Install the elasticsearch gem from Rubygems:

$ gem install elasticsearch

Or add it to your project's Gemfile:

gem 'elasticsearch', 'VERSION'

Usage example

require 'elasticsearch'

client = Elasticsearch::Client.new(log: true)

# if you specify Elasticsearch host
# client = Elasticsearch::Client.new url: 'http://localhost:9200', log: true

client.transport.reload_connections!

client.cluster.health

client.search(q: 'test')

# etc.

See also doc/examples for some practical examples.

For optimal performance, you should use a HTTP library which supports persistent ("keep-alive") connections, e.g. Patron or Typhoeus. These libraries are not dependencies of the Elasticsearch gems. Ensure you define a dependency for a HTTP library in your own application.

Check out these other official Ruby libraries for working with Elasticsearch:

• elasticsearch-rails - integration with Ruby models and Rails applications.
• elasticsearch-extensions, deprecated.
• elasticsearch-dsl which provides a Ruby API for the Elasticsearch Query DSL.

Please see their respective READMEs for information and documentation.

Compatibility

We follow Ruby’s own maintenance policy and officially support all currently maintained versions per Ruby Maintenance Branches.

Language clients are forward compatible; meaning that clients support communicating with greater or equal minor versions of Elasticsearch. Elasticsearch language clients are only backwards compatible with default distributions and without guarantees made.

Development

See CONTRIBUTING.

License

This software is licensed under the Apache 2 license. See NOTICE.