ActiveSupport Subscriber #notifier attribute notifier Ruby on Rails 5.2.8.1 Since v4.1.16 Available in: v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2 Compare with: … v4.1.16 v4.2.9 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2 TODO Change this to private once we’ve dropped Ruby 2.2 support. Workaround for Ruby 2.2 “private attribute?” warning.
