Rails serialization error for async geocoding with ahoy gem using mongoid

Question

I have a Rails 5 app, running both a postgresql DB for application data and MongoDB (mongoid) for analytics, generated by the fantastic ahoy gem.

Everything works great until I switch to asynchronous geocoding in config/initializers/ahoy.rb, which generates the error below:

ActiveJob::SerializationError (Unsupported argument type: Visit):

The app is using delayed_job, for background processing.

I there a workaround for this issue, or is this caused by incompatibility between mongoid and delayed_job?

Answer 1

Try adding the GlobalId mixin to your model

class Visit
  include GlobalID::Identification
end