kinda?.rb

require 'sunspot'
require 'sunspot/rails'
require 'feedjira/feed'

module Sunspot
  module Feedjira::Feed
    def self.included(base)
      base.class_eval do
        extend Sunspot::Rails::Searchable::ActsAsMethods
        Sunspot::Adapters::DataAccessor.register(DataAccessor, base)
        Sunspot::Adapters::InstanceAdapter.register(InstanceAdapter, base)
      end
    end

    class InstanceAdapter < Sunspot::Adapters::InstanceAdapter
      def id
        @instance.id
      end
    end

    class DataAccessor < Sunspot::Adapters::DataAccessor
      def load_all(ids)
        entries.select { |entry| ids.include?(entry.id) }
      end

      def load(id)
        entries[id]
      end
    end
  end
end