config/initializers/silenceable_logger.rb

silenceable_logger.rb

# inspired by : http://dennisreimann.de/blog/silencing-the-rails-log-on-a-per-action-basis/
#
# file: ./config/initializers/silenceable_logger.rb
#
# then, in some crazy js polling action use
#
#   ajax('/poll?silence=logger')
#
  Rails::Rack::Logger.class_eval do 
    def call_with_silenced_logger(env)
      if env['QUERY_STRING'] =~ /silence=logger/iomx
        begin
          a = Rails.logger.level
          b = ActionController::Base.logger.level
          Rails.logger.level = :fatal
          ActionController::Base.logger.level = :fatal
          call_without_silenced_logger(env)
        ensure
          Rails.logger.level = a
          ActionController::Base.logger.level = b
        end
      else
        call_without_silenced_logger(env)
      end
    end

    alias_method_chain(:call, :silenced_logger)
  end