Log use of the default route in rails

Question

I am trying to remove the "catch all" or "default" route from a production rails application. I'm interested in maintaining operation while gathering a log of it's usage so that I can replace it with the appropriate hard coded routes.

So, given I have the following default route line in my config/routes.rb file.

match '/:controller(/:action(/:id))'

How could I create or retrieve a log of every time that route gets hit. This log would ideally include only requests actually handled by this route along with parameters and would need to leave the route itself functioning as normal.

Answer 1

Another possibility would be to make use of Rails router constraints option:

match '/:controller(/:action(/:id))', constraints: -> (req) {
  Rails.logger.info("Default route used: #{req.path.inspect}")
  true
}

Note: the lambda returns true so that the match succeeds.

Answer 2

One way you can do this is the change the default route to:

match ':controller(/:action(/:id))(.:format)', :using_default_route => true

Then put the following function into app/controllers/application_controller.rb

before_filter do
  if params[:using_default_route]
    logger.info("Default route for #{request.path.inspect}. params = #{params.inspect}")
  end
end