method

add_observer

v3.0.9 - Show latest stable - 0 notes - Class: ActiveModel::Observing::ClassMethods

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What's this?

add_observer(observer) public

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# File activemodel/lib/active_model/observing.rb, line 42
      def add_observer(observer)
        unless observer.respond_to? :update
          raise ArgumentError, "observer needs to respond to `update'"
        end
        @observer_instances ||= []
        @observer_instances << observer
      end

add_observer

Related methods

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