taco_routes.rb

namespace :taco do
  resources :ingredients do
    get :search1, on: :member
    resource :search2, only: :show
  end
end

search1_taco_ingredient GET     /taco/ingredients/:id/search1(.:format)                                  taco/ingredients#search1
taco_ingredient_search2 GET     /taco/ingredients/:ingredient_id/search2(.:format)                       taco/search2s#show