After Upgrade from Rails 4 to Rails 5 getting error NameError: uninitialized constant Sidekiq::Extensions::DelayedModel

[sonugaur]

I am working on Rails on rails application that has a version

ruby "2.6.6"
gem 'rails', '4.2.11'
gem 'sidekiq', '~> 4.2', '>= 4.2.10'
    

Now I am upgrading it to Rails 5 with version

ruby "2.7.6"
gem 'rails', '5.1.7'
gem 'sidekiq', '~> 5.2', '>= 5.2.7'

I have the following code in sidekiq file config/initializers/sidekiq.rb

require 'sidekiq'
require 'sidekiq/web'
require 'sidekiq/extensions/action_mailer'
require 'sidekiq/extensions/active_record'
require 'sidekiq/extensions/generic_proxy'
require 'logger'
Sidekiq.configure_server do |config|
  config.redis = { url: ENV['REDISCLOUD_URL'] }
  Rails.logger.formatter = Sidekiq::Logging.logger.formatter
end

Sidekiq.configure_client do |config|
  config.redis = { url: ENV["REDISCLOUD_URL"]}
end

ENV['REDIS_PROVIDER'] = ENV['REDISCLOUD_URL'] || '127.0.0.1:6379'
Sidekiq::Extensions.enable_delay!

But I am getting an error on staging environment NameError: uninitialized constant Sidekiq::Extensions::DelayedModel when any .delay method called from a specific code file or from callbacks (existing code)

I have tried to change .delay in some parts of the code to perform_aync but getting the same error
And also I find it weird that when I retry all the jobs manually from the staging rails console or staging sidekiq web the job got executed without any error.

On the Local machine, everything is working fine even though I connected the staging environment on local and it also looks fine

Please refer below screenshot

before retry

after manual retry

[mperham]

I'm glad to see you upgrading but Sidekiq 4 and 5 are no longer supported. Review the upgrade notes for each major version in docs/

[sonugaur]

Thanks for your quick response.
So .delay will be available if I upgrade to the latest version ??

[sonugaur]

Okay so now I have upgraded sidekiq with version

gem 'sidekiq', '~> 6.0'
gem 'redis', '~> 4.1.0'

But I am getting the same error, Please help to suggest.

[mperham]

I'm not going to walk you through an upgrade. Read the docs and follow the directions. Upgrade ONE major version at a time.

[sonugaur]

Yes, I have followed the doc's instructions and made the changes accordingly.
From the last 4-5 days I have tried each and every solution to resolve this error but nothing works. That's why I came here maybe someone who can help in the discussion thread.

I have also made some dirty hacks like below which is executed every 10 min.

namespace :retry_sidekiq_job do
  desc "Retry Jobs"
  task add: :environment do
    require 'sidekiq/api'
    Sidekiq::RetrySet.new.retry_all
  end
end

[mperham]

I'm not sure of the problem: S::E::DelayedModel is defined in sidekiq/extensions/active_record so NameError makes no sense.

Replace your initializer code with this:

ENV['REDIS_PROVIDER'] = 'REDISCLOUD_URL' if ENV['REDISCLOUD_URL']
Sidekiq.configure_server do |config|
  Rails.logger.formatter = Sidekiq::Logging.logger.formatter
end

Sidekiq::Extensions.enable_delay!