ActiveModel::Serializer cache_digest-esque behavior

my_serializer.rb

class PersonSerializer < ActiveModel::Serializer
  def model_version
    Digest::MD5.hexdigest(File.read(File.join(Rails.root, "app/serializers", "#{self.class.to_s.underscore}.rb")).gsub(/\s/,''))
  end
end

When you're serializing data for an API, you probably want your caches to get cleared when you add/remove/change payloads. It would be nice to have functionality similar to cache_digests, such that if the template changes, so does the cached data. Including this code in your cache key gives you that.

This code obviously makes a lot of assumptions. You will need to twerk it as necessary.