Delayed::Job losing active record relation, but instead array

I am having a Job class for sending Email. I am passing the collection (active record relation object, lets say @payments = Payment.where(status: 'pending') to the argument of Mailer class.

Delayed::Job.enqueue(
  EmailJob.new(
    company: current_company,
    type: :payments,
    collection: @payments # Payment::ActiveRecord_Relation
  ),
  target: 'Payment Email',
  company: current_company
)

The problem I am facing is, When the worker picks the Job, the collection is considered as just an Array of payments, I am expecting this as an activerecord collection object so that I can do some stuffs over those.

Solution

ActiveJob supports the following types of arguments by default:

Basic types (NilClass, String, Integer, Float, BigDecimal, TrueClass, FalseClass)

Symbol

Date

Time

DateTime

ActiveSupport::TimeWithZone

ActiveSupport::Duration

Hash (Keys should be of String or Symbol type)

ActiveSupport::HashWithIndifferentAccess

Array

Module

Class

- Rails guides: Active Job Basics

When you pass an ActiveRecord::Relation, Rails will serialize it by casting it into an array as its not a supported type. ActiveJob does use GlobalId to pass individual records though so it seems like a better option is probally just to create an association or some other method to fetch the payments in your job given a company.