A Lograge extensions for Rails

Rails middleware for Lograge with support to log exceptions from Rails and ActiveJobs.

Logs:

• Rails exceptions with more information than pure Lograge. You can add custom fields, which will be logged on exception (user, IP, full exception backtrace etc.).
• Exceptions occurred during running jobs on ActiveJob (Rails 4.2+)

Installation

Add line to your application's Gemfile:

gem 'rails' # minimal version is 4.0
gem 'lograge'
gem 'lograge_rails_middleware'

Now, gem should catch all exceptions thrown by Rails and save it to Lograge.

Please remember about Lograge configuration.

Custom setup

You can configure additional fields, which will be logged for every exception.

# config/initializers/lograge_middleware.rb
Rails.configuration.tap do |config|
  config.rails_lograge_middleware.custom_options = lambda do |exception, env, request|
    # Example of logging remote IP, request ID, params and current logged user
    #
    # == Parameters:
    # exception:
    #   Occurred exception
    # env:
    #   Environment variables hash with request data
    # request:
    #   Request sent to application wrapped in Rack::Request
    #
    # == Returns:
    # Hash with elements to write to log
    #

    controller = env['action_controller.instance'] # current Rails controller
    user = controller.try(:current_user) # we try to get current logged user
    options = {
        remote_ip: request.ip,
        request_id: env['action_dispatch.request_id'],
        # we reject controller and action, because gem log it already
        params: request.params.reject { |key| %w(controller action utf8).include? key }.to_json
    }
    
    if user
      options[:user_id] = user.try(:id)
      options[:user_email] = user.try(:email)
    end
    options
  end
  
  config.rails_lograge_middleware.active_job_custom_options = lambda do |exception, job|
    # Examples of logging ActiveJob arguments
    #
    # == Parameters:
    # exception:
    #   Occurred exception
    # job:
    #   ActiveJob instance, which crashed
    #
    # == Returns:
    # Hash with elements to write to log
    #
    
    options = {
        arguments: job.arguments
    }
    options
  end
end

References:

Rack::Request

Changes

• 1.1.0 - Added ActiveJob exceptions logging
• 1.0.0 - Initial version with requests exception logging