Routes: Add `/costs` route

Render the `costs` field of a `Chouette::Route` as JSON. This lives at:
http://stif-boiv.dev:3000/referentials/4/lines/1857/routes/7/costs.json

I want this in order to get the distance & time costs of a route so that
I can merge them with `JourneyPattern#costs` on the frontend on
`JourneyPatternsCollection#show`.

Refs #6203

1 files changed, 1 insertions, 0 deletions

diff --git a/config/routes.rb b/config/routes.rb
index 6313b5678..25105241a 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -74,6 +74,7 @@ ChouetteIhm::Application.routes.draw do
         member do
           get 'edit_boarding_alighting'
           put 'save_boarding_alighting'
+          get 'costs'
           post 'duplicate', to: 'routes#duplicate'
         end
         resource :journey_patterns_collection, :only => [:show, :update]