How do refer to the method autocomplete_person_name? I'm getting a NameError in People#index.html

index.html.erb

<script>
  $(function() {
      $("person_name").autocomplete({
          source: "<%= people_autocomplete_person_name_path %>"
      });                                                       
  })
</script>

people_controller.rb

class PeopleController < ApplicationController
  def index
  end

  def autocomplete_person_name
    render json: Person.search(params['term'])
  end
end