A helper library for event sourcing Rails ActiveRecord model changes to Kafka(more brokers coming soon).


Add this line to your application's Gemfile:

gem 'eventsourcer'

And then execute:

$ bundle


In initializer configure Eventsourcer:

  Eventsourcer.configure do |config| = :kafka #required
    config.kafka_seed_brokers = ["localhost:9092"] #optional
    config.kafka_max_queue_size = 10000 #optional

Add Eventsourcer to a model you would like to track:

  require "eventsourcer"
  class User < ApplicationRecord
    include Eventsourcer


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at