Customizing Lograge: Removing and adding fields

application_controller.rb

# app/controllers/application_controller.rb

# class ApplicationController < ActionController::Base
  require "browser"
  
  def append_info_to_payload(payload)
    super
    payload[:user_agent] = browser.user_agent
    payload[:search_engine] = browser.search_engine?
  end
# end

custom_formatter.rb

# lib/utils/custom_formatter.rb

module Lograge
  module Formatters
    class CustomFormatter < Lograge::Formatters::KeyValue
      def call(data)
        data = data.delete_if do |k|
          [:controller, :action, :format].include? k
        end
        super
      end
    end
  end
end

Gemfile

# Gemfile

# add at the end, then run `bundle install`
gem 'lograge'
gem 'browser'

lograge.rb

# config/initializers/lograge.rb

# Replace 'YourApp' with the name of your app
YourApp::Application.configure do
  require File.expand_path(Rails.root.join('lib', 'utils', 'custom_formatter.rb'), __FILE__)
  config.lograge.enabled = true
  config.lograge.formatter = Lograge::Formatters::CustomFormatter.new
  config.lograge.custom_options = lambda do |event|
    {:time => event.time, :search_engine => event.payload[:search_engine], :user_agent => event.payload[:user_agent]}
  end
end