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acts_as_solr Rails plugin

This plugin adds full text search capabilities and many other nifty features from Apache's Solr to any Rails model. It was based on the first draft by Erik Hatcher.

Current Release

The current stable release is v0.9 and was released on 06-18-2007.


Please refer to the CHANGE_LOG


For Rails >= 2.1:

script/plugin install git://

For Rails < 2.1:

cd vendor/plugins
git clone git://
rm -rf acts_as_solr/.git

Make sure you copy vendor/plugins/acts_as_solr/config/solr.yml to your Rails application's config directory, when you install via git clone.

Here is an example solr.yml configuration:

# Config file for the acts_as_solr plugin.
# If you change the host or port number here, make sure you update
# them in your Solr config file


  jvm_options: -server -d64 -Xmx1024M -Xms64M




If you are using acts_as_solr as a Rails plugin, everything is configured to work out of the box. You can use rake solr:start and rake solr:stop to start and stop the Solr web server (an embedded Jetty). If the default JVM options aren't suitable for your environment, you can configure them in solr.yml with the option jvm_options. There is a default set for the production environment to have some more memory available for the JVM than the defaults, but feel free to change them to your liking.

If you are using acts_as_solr as a gem, create a file named lib/tasks/acts_as_solr.rake:

require "acts_as_solr/tasks"

Basic Usage

# Just include the line below to any of your ActiveRecord models:

# Or if you want, you can specify only the fields that should be indexed:
  acts_as_solr :fields => [:name, :author]

# Then to find instances of your model, just do:
  Model.find_by_solr(query) #query is a string representing your query

# Please see ActsAsSolr::ActsMethods for a complete info

acts_as_solr in your tests

To test code that uses acts_as_solr you must start a Solr server for the test environment. You can do that with rake solr:start RAILS_ENV=test

However, if you would like to mock out Solr calls so that a Solr server is not needed (and your tests will run much faster), just add this to your test_helper.rb or similar:

class ActsAsSolr::Post
  def self.execute(request)



Erik Hatcher: First draft
Thiago Jackiw: Previous developer
Luke Francl: Current developer
Mathias Meyer: Current developer


Check the project website or stop by the Google Group. Send bug reports through GitHub Issues.

Release Information

Released under the MIT license.

More info

The old acts_as_solr homepage is no more. For more up-to-date information, check out the project page of the current mainline on GitHub.