ARオブジェクトをURI化する`ActiveJob::Arguments#serialize`が色々と使えそう ref: http://qiita.com/EastResident/items/41a016ac97b8691a2aa3

file0.txt

user = User.find(5)

SampleJob.perform_later(user)

file1.txt

serialized_args = ActiveJob::Arguments.serialize([user])

〜〜〜
略
〜〜〜

args = ActiveJob::Arguments.deserialize(serialized_args)

file2.txt

[{"_aj_globalid"=>"gid://project_name/User/5"}]

file3.txt

require 'active_job/arguments'

file4.txt

def store_sample(*args)
  key = SecureRandom.hex(12)
  serialized_args = ActiveJob::Arguments.serialize(args)
  Rails.cache.fetch(key.to_s) { serialized_args }
end

store_sample(User.find(4))