ruby on rails - Why Generated Active Record Query dosen't run in sidekiq

Question

I am having a code that runs a delayed job that generates a report and then sends in an email here : InstancesExportJob.perform_later(instances: instances, custom_field_key: options[:custom_field_key],tag_columns: options[:tags],user: User.current,report_url: report_url)

where instances is a generated active record query that is generated by another class this code fails and gives the following error: ActiveJob::SerializationError:Unsupported argument type: ActiveRecord::Relation. where the first operation that is done on instances is a map function call.

but changing the code to this makes it work fine: InstancesExportJob.perform_later(instances: instances.to_a, custom_field_key: options[:custom_field_key],tag_columns: options[:tags],user: User.current,report_url: report_url).

I am confused as running the code without delayed jobs works fine.

Am using rails 4.2 and sidekiq

Answer 1

I think the problem was with sidekiq as it do not allow a wide variety of parameter types and having the instance as an active record relation made the whole thing raise an error