Return an array containing all the keys that are used in this route. This includes keys that appear inside the path, and keys that have requirements placed upon them.

Source Code

# File action_controller/routing/route.rb, line 188
def significant_keys
  @significant_keys ||= returning [] do |sk|
    segments.each { |segment| sk << segment.key if segment.respond_to? :key }
    sk.concat requirements.keys
    sk.uniq!
  end
end