ElasticSearch integration to ActiveRecord

fulltext_searchable.rb

module FulltextSearchable
  extend ActiveSupport::Concern

  included do
    include Elasticsearch::Model
    include Elasticsearch::Model::Callbacks
  end

  module ClassMethods
    # Use this method to specify which columns you want to index
    def index_only(*columns)
      define_method(:as_indexed_json) do |_|
        as_json(:only => columns)
      end
    end
  end
end