How can I disable logging in Ruby on Rails on a per-action basis?

I have a Rails application which has an action which is invoked frequently enough to be inconvenient when I am developing, as it results in a lot of extra log output I don't care about. How can I get rails not to log anything (controller, action, parameters, complection time, etc.) for just this one action? I'd like to conditionalize it on RAILS_ENV as well, so logs in production are complete.

Thanks!

Solution 1:

You can silence the Rails logger object:

def action
  Rails.logger.silence do
    # Things within this block will not be logged...
  end
end

Solution 2:

Use lograge gem.

Gemfile:

gem 'lograge'

config/application.rb:

config.lograge.enabled = true
config.lograge.ignore_actions = ['StatusController#nginx', ...]

Solution 3:

The following works with at least Rails 3.1.0:

Make a custom logger that can be silenced:

# selective_logger.rb
class SelectiveLogger < Rails::Rack::Logger

  def initialize  app, opts = {}
    @app = app
    @opts = opts
    @opts[:silenced] ||= []
  end

  def call  env
    if @opts[:silenced].include?(env['PATH_INFO']) || @opts[:silenced].any? {|silencer| silencer.is_a?( Regexp) && silencer.match( env['PATH_INFO']) }
      Rails.logger.silence do
        @app.call env
      end
    else
      super env
    end                        
  end

end

Tell Rails to use it:

# application.rb
config.middleware.swap Rails::Rack::Logger, SelectiveLogger, :silenced => ["/remote/every_minute", %r"^/assets/"]

The example above shows silencing asset serving requests, which in the development environment means less ( and sometimes no) scrolling back is required to see the actual request.