gistfile1.rb

# lib/download_counter.rb
def downloads_for(records)
  ids = records.all.each.map(&:uuid).join(",")
  JSON.parse(Excon.get("/downloads?uuids=#{ids}"))
end

# controller
def index
  @episodes = Episode.find_all_by_whatever
  @downloads = DownloadCounter.downloads_for(@episodes)
end

# view
@episodes.each do |episode|
  <h2><%= episode.title %></h2>
  <p>Downloads: <%= @downloads[episode] %></p>
end

I can't believe I paid for this.