Cool logging snippets

log_assets_quietly.rb

# This silences assets logger.
# Till https://github.com/rails/rails/issues/2639 is resolved
# this is the only way to have a reasonable logs.
# Someone, please, study
# - https://github.com/rails/rails/pull/3741
# - https://github.com/rails/rails/pull/3795
# and submit a correct pull request as suggested.
#
# Solution taken from http://stackoverflow.com/questions/7471606/dont-log-asset-requests-in-rails-3-1-in-development-mode

Rails.application.assets.logger = Logger.new('/dev/null')
Rails::Rack::Logger.class_eval do
  def call_with_quiet_assets(env)
    previous_level = Rails.logger.level
    Rails.logger.level = Logger::ERROR if silence?(env)
    call_without_quiet_assets(env).tap do
      Rails.logger.level = previous_level
    end
  end
  alias_method_chain :call, :quiet_assets

  def silence?(env)
    env['PATH_INFO'].index("/assets/") == 0
  end

end

log_formatter.rb

# Log time and log level.
# Monkey patch. Sorry.

class Logger::SimpleFormatter
  # This method is invoked when a log event occurs
  def call(severity, timestamp, progname, msg)
    msg = "#{String === msg ? msg : msg.inspect}"
    "[#{timestamp.to_s(:log)}] #{"%5s"% severity.upcase} #{msg}\n"
  end
end

log_full_urls.rb

# This brings full urls to logs
# Monkey-patch. Sorry.

Rails::Rack::Logger.class_eval do
  def call_app(env)
    request = ActionDispatch::Request.new(env)
    Rails.logger.info ""
    Rails.logger.info ""
    Rails.logger.info "Started #{request.request_method} \"#{request.url}\" for #{request.ip} at #{Time.now.to_default_s}"
    @app.call(env)
  ensure
    ActiveSupport::LogSubscriber.flush_all!
  end
end

log_partials_to_debug.rb

class ActionView::LogSubscriber
  def render_template(event)
    log_rendering_event("info", event)
  end

  def render_partial(event)
    log_rendering_event("debug", event)
  end
  alias :render_collection :render_partial

  def log_rendering_event(severity, event)
    message = "  Rendered #{from_rails_root(event.payload[:identifier])}"
    message << " within #{from_rails_root(event.payload[:layout])}" if event.payload[:layout]
    message << (" (%.1fms)" % event.duration)
    send(severity, message)
  end
end