This Rails plugin adds default_named_routes_options to the controllers and mailers. It comes handy for example when you are working on mailers. You have to specify the whole URI in your links, because otherwise these links obviously can’t work in these emails. To ensure this works, you have to specify a host via default_url_options method and then you need to specify only_path: false for each link in your mailer views. This is pretty annoying and of course when you forget about it, your clients won’t be very happy.
# this comes from Rails itself ActionMailer::Base.default_url_options[:host] = "http://example.com" # and this from the plugin ActionMailer::Base.default_named_routes_options[:only_path] = false