Fix for DelayedJob + ActiveRecord + Rollbar for max DB text size

fix_delayed_job.rb

require 'rollbar'
require 'rollbar/delay/delayed_job'
require 'delayed/backend/active_record'

module Rollbar
  MAX_TEXT_SIZE = 65_535 # Max size for text columns in MySQL

  class DelayedHandlerTooLarge < StandardError
  end
end

Delayed::Backend::ActiveRecord::Job.class_eval do
  before_save do
    raise Rollbar::DelayedHandlerTooLarge if handler.size > Rollbar::MAX_TEXT_SIZE
  end
end

Rollbar::Delay::DelayedJob.class_eval do
  class << self
    def call(payload)
      new.delay.call(payload)
    rescue Rollbar::DelayedHandlerTooLarge
      truncate_payload(payload)

      retry
    end

    def truncate_payload(payload)
      # Here mutate the payload
    end
  end
end