I just recently upgraded to 1.0.3, and the routes.rb file in my config/routes folder seems to ignore all my custom routes.
1.0.3
MY routes.rb
For me prepend did not work. for me draw did the work:
Spree::Core::Engine.routes.draw do resources :orders, except: [:new, :create, :destroy] do post :my_order, on: :collection end end