gistfile1.rb

class PluginRater
  def self.rate_plugin_for_user!(rating, plugin, user)
    plugin.update_rating_for_user(rating, user)
    Event::Publish('user_rated_a_plugin', rating, plugin, user)
    Auditor::AuditRatingChange(rating, plugin, user)
  end
end

class Controller
  def rate
    begin
      PluginRater.rate_plugin_for_user!(params[:rating], @plugin, current_user)
    rescue ActiveRecord::RecordInvalid => e
      NewRelic::Agent.notice_error(e)
    end
  end
end