Question

I am having issues with my Rails 3.1 app. I have two controllers & models, named counties/county and towns/town.

The county model has has_many :towns and the town model has belongs_to :county.

I am trying to show the County name on the Towns index page to show the title as ‘Towns in -county-name-‘. However, when I put %h1 Towns in #{@towns.county.name} I get a undefined method 'county' error.

The towns controller for index is

def index
    @towns = Town.all
end

For the county controller:

def index
    @counties = County.all
end

My routes.rb is

resources :counties, :path => "/locations" do
    resources :towns, :path => "/"
end

What am I doing wrong?

EDIT: Using this in my towns/index view and it shows the town.county.id and town.county.name:

- @towns.each do |town|
  %tr
    %td= town.county.id
    %td= town.county.name
    %td= town.name
    %td= town.description
    %td= town.slug

Answer 1

I had a similar problem with states and countries (vs town and counties).
For your town migration, did you have an integer to reference the county (see county_id below)

class CreateTowns < ActiveRecord::Migration
  def change
    create_table :towns do |t|
      t.string :name
      t.integer :county_id

      t.timestamps
    end
  end
end

Then in your app/views/town/index.html.erb you can do a County.find

 %tr
    %td= town.county.id
    %td= County.find(town.county_id).name
    %td= town.name
    %td= town.description
    %td= town.slug