Question

and can’t understand why my code is not work

i have next:
people/index.html.erb =>

  <% @people.each do |i| %>
    <tr>
      <td><%= i.id %></td>
      <td><%= i.name %></td>
      <td><%= link_to i.country_id, root_path(:country_id => i.country_id) %></td>
      <td><%= i.state_id %></td>
    </tr>
  <% end %>

people_controller:

  def index
    @people = Person.all
    @people = @people.by_country_id(params[:country_id]) if params[:country_id].present?
  end

in person.rb

scope :by_country_id, lambda { |x| where(:country_id => x) }

root :to => ‘people#index’

i want, when i click in link_to, i received all people with country_id

in the output i have …localhost:3000/?country_id=1001

NoMethodError in PeopleController#index 
undefined method `by_country_id'

where i mistake ?

Answer 1

Change

@people = @people.by_country_id(params[:country_id]) if params[:country_id].present?

To

@people = Person.by_country_id(params[:country_id]) if params[:country_id].present?