instance method `add_observer`

Ruby on Rails 3.0.20

Since v3.0.20 Last seen in v3.2.22.5

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add_observer(observer)

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Parameters

observer req

Source

# 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

Defined in activemodel/lib/active_model/observing.rb line 42 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveModel::Observing::ClassMethods

Signature

Parameters