method
included
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Class: ActiveRecord::Callbacks
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included(base)
public
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# File activerecord/lib/active_record/callbacks.rb, line 192 def self.included(base) #:nodoc: base.extend Observable [:create_or_update, :valid?, :create, :update, :destroy].each do |method| base.send :alias_method_chain, method, :callbacks end base.send :include, ActiveSupport::Callbacks base.define_callbacks *CALLBACKS end