apply same options to multiple routes

Question

Let say I have following conditions to apply on a bunch of resources:

:only => [:create, :destroy], :defaults => {:format => :json}, :constraints => {:format => :json}

My question is how can I apply these conditions to multiple routes at once, e.g:

group resources [:resource1, :resource2] do
    :only => [:create, :destroy], :defaults => {:format => :json}, :constraints => {:format => :json}
end

Answer 1

routes.rb is just ruby, so you can place ruby code on top like this

my_defaults = { 
  only:        [:create, :destroy], 
  defaults:    { format: :json }, 
  constraints: { format: :json }
}

Rails.application.routes.draw do
  # ...
  resources :users, my_defaults
  # ...
end