I've come up against a bug with ActiveRecord when using namespaces models and polymorphic associations, it's a common use-case so should probably be fixed before a 4.2 release.

Error:

NoMethodError: undefined method `relation_delegate_class' for Comment:Module

Example:

class Post::Base < ActiveRecord::Base
  self.table_name = 'posts'
end

class Post::Special < Post::Base
  has

This is a bag of thoughts issue, I encourage everyone to file more specific detailed issues and send pull requests.

• do not use keyword arguments in plain Sidekiq workers mperham/sidekiq#2372 (check if it works or not with ActiveJob)

• do not schedule jobs inside a transaction if a record created/updated inside this transaction will be directly or indirectl