20150205022022_create_tacos.rb

class CreateTacos < ActiveRecord::Migration
  def self.up
    create_table :tacos do |t|
      t.string :name
      t.text :ingredients

      t.timestamps null: false
    end
  end
  def self.down
   drop_table :tacos
  end
end

Error

bin/spring stop
Spring stopped.
[Elasticsearch]$ rails c
Loading development environment (Rails 4.2.0)
2.1.2 :001 > TacosIndex
 => TacosIndex 
2.1.2 :002 > TacosIndex::Taco
 => TacosIndex::Taco 
2.1.2 :003 > TacosIndex::Taco.import(Taco.all)
Faraday::ConnectionFailed: Connection refused - connect(2) for "localhost" port 9200
	from /home/thinb/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/net/http.rb:879:in `initialize'
	from /home/thinb/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/net/http.rb:879:in `open'

taco.rb

class Taco < ActiveRecord::Base
    update_index('tacos#taco') { self }
end

tcos_index.rb

class TacosIndex < Chewy::Index
  define_type Taco do
     field :name, :ingredients
   end
end