Another option is to modify Rails, via an initializer.
I don't recommend this though, since it may break in future versions (edit: doesn't work in Rails 5).
Using :path as shown above is better.
# Using private APIs is not recommended and may break in future Rails versions.
# https://github.com/rails/rails/blob/4-1-stable/actionpack/lib/action_dispatch/routing/mapper.rb#L1012
#
# config/initializers/adjust-route-paths.rb
module ActionDispatch
module Routing
class Mapper
module Resources
class Resource
def path
@path.dasherize
end
end
end
end
end
end