ActiveType::Object loses value in Rails cache

[0llirocks]

active_type: 2.6.2
rails: 8.0.2
ruby: 3.3.4

class User < ActiveType::Object
    attribute :firstname
end

When I pass a object or an array of objects into the Rails.cache it seems to work in the first place but once I try to read the values via the corresponding cache key, the returned value has all attributes set to nil. This also applies to arrays, all objects in that array are nilled.

Rails.cache.fetch('cache_key') { User.create(firstname: 'test')  } # => #<User firstname: "test">
Rails.cache.fetch('cache_key') # => #<User firstname: "nil">

Any idea what's going on here?

[kratob]

Hi @0llirocks ,

This seems to be a bug. ActiveRecord has implemented custom marshalling and ActiveType does to not support this for "virtual" attributes. I think we never attempted to serialize ActiveType::Object, but this should clearly work.

We would need to override ActiveRecord's marshal_dump / marshal_load methods somehow. See https://github.com/rails/rails/blame/main/activerecord/lib/active_record/marshalling.rb

We'll try to fix this, but I cannot promise how fast we'll get around to it. Would welcome PRs.

[martinschaflitzl1]

Just released version 2.6.5, which should fix this issue.