Thoth

Easy event logging for Rails.

Installation

Add this line to your application's Gemfile:

gem 'thoth'

And then execute:

$ bundle

Or install it yourself as:

$ gem install thoth

Usage

Basics

The default Thoth.logger will write to log/events_#{Rails.env}.log and include time. It will also populate context with the current params and current_user.id if current_user is defined.

Thoth.logger.log(:ship_notice, previous_state: :processing, next_state: :shipped)
# {"event":"ship_notice","time":"25/Sep/2014:01:02:25 +0000","context":{"controller":"shipments","action":"create","current_user":1},"details":{state:'shipped'}}

Thoth.logger.log(:ship_notice, {context: { source: :api }}, state: :shipped)
# {"event":"ship_notice","time":"25/Sep/2014:01:02:25 +0000","context":{"controller":"shipments","action":"create","current_user":1,source:'api'},"details":{state:'shipped'}}

Logging changes to a model

Include Thoth::Rails::Model on your model and declare log_events.

class Cat < ActiveRecord::Base
  include Thoth::Rails::Model

  # :on (default [:create, :update, :destroy]) - which events should be logged
  # :only (default all attributes) - for updates, only log when these attributes are changed
  log_events on: [:update, :destroy], only: [:mood, :name]
end

Changing default context

If you'd like to change what is included in the context in requests, you can overwrite the thoth_request_context method in your controllers.

class ApplicationController

  def thoth_request_context
    super.merge(customer: current_customer.id)
  end
end

Changing the default logger

# create a initializers/thoth.rb file
file = File.open(Rails.root.join(*%w[log checkout_events.log]), 'a')
Thoth.logger = Thoth::Logger.new(Thoth::Output::Json.new(file))

Contributing

1. Fork it ( https://github.com/[my-github-username]/thoth/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