Ruby on Rails nested routes with has_one association

Question

I have two models:

Reservation:

class Reservation < ActiveRecord::Base
  has_one :car_emission
end

CarEmission:

class CarEmission < ActiveRecord::Base
  belongs_to :reservation
end

and following routes:

resources :reservations do 
  resources :car_emissions
end

Now when I want to create new car_emission i must visit url like this:

http://localhost:3000/reservations/1/car_emissions/new

and when i want to edit I must visit:

http://localhost:3000/reservations/1/car_emissions/1/edit

Is there anyway to change routes that my car_emission edit link will look like this:

http://localhost:3000/reservations/1/car_emission

Answer 1

You want to do several things:

1. Create singular resource
2. Change the `edit` path for your controller

---

Singular Resource

As suggested by @sreekanthGS, you'll firstly be best creating a singular resource. This works in the same way as the resources method, except it treats your route as a single record; doing away with the index route etc:

#config/routes.rb
resources :reservations do
    resource :car_emission # -> localhost:3000/reservations/1/car_emission
end

---

Edit

This will create a set of RESTful routes for your car_emission , but it will still take you to the car_emissions#show action when you hit the "naked" link

You'll be best doing this:

#config/routes.rb
resources :reservations do
    resource :car_emission, except: :show, path_names: { edit: "" }
end

This will take you to the edit action when you hit the "naked" link