ActiveModel Observing ClassMethods module ClassMethods Ruby on Rails 2.3.18 Since v2.2.3 Last seen in v3.2.22.5 Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 Compare with: … v2.2.3 v3.0.20 v3.1.12 v3.2.22.5 No documentation comment. Methods (defined here) # inherited # instantiate_observer # instantiate_observers # observers # observers=
