rsl (owner)

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gist: 199972 Download_button fork
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module TryChain
  def try_chain(*method_list)
    target = self
    method_list.each do |method|
      target = target.send(method)
    end
    target
  rescue NoMethodError
    nil
  end
end
 
module NilTryChain
  def try_chain(*method_list)
    nil
  end
end
 
ActiveRecord::Base.__send__ :include, TryChain
NilClass.__send__ :include, NilTryChain