ActiveModel Observing ClassMethods module ClassMethods Ruby on Rails 3.2.22.5 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 v2.3.18 v3.0.20 v3.1.12 No documentation comment. Methods (defined here) # add_observer # count_observers # inherited # instantiate_observers # notify_observers # observer_instances # observers # observers=
