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youcune/try_chain.rb

Last active August 29, 2015 14:09
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try_chain depends on ActiveSupport
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try_chain.rb
class Object
def try_chain(*args)
args.inject(self) { |_, method| _.try(method) }
end
end
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youcune commented Nov 15, 2014

たとえば omniauth-facebook 使って最終学歴を取りたいとき

request.env['omniauth.auth'].try_chain(:extra, :raw_info, :education, :last, :school, :name)

って書ける。途中どこかでコケたら nil になる。

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