Always define respond_to_missing? when overriding method_missing

July 30, 2012 Tagged: method_missing ruby respond_to_missing? Comments (View) Always define respond_to_missing? when overriding method_missing method_missing is still considered scary, but here’s something more scary: forgetting to override respond_to? . Whoa, right? Just gave you an anxiety attack there. How about #method , though? Does that still work? Go ahead, try it. Here, I’ll try it with you: require 'ostruct' class Order def user @_user ||= OpenStruct.new(name: 'Mike', age: 28, occupation: 'slacker') end def method_missing(method_name, *arguments, &block) if method_name.to_s =~ /user_(.*)/ user.send($1, *arguments, &block) else super end end def respond_to?(method_name, include_private = false) method_name.to_s.start_with?('user_') || super end end OK now I’ll load that into irb and play with it: ruby-1.9.2-p290> order = Order.new => #<Order:0x00000001e40948> ruby-...

Full article: http://robots.thoughtbot.com/post/28335346416/always-defi...

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@IndianGuru » 13 Aug '12, 3am
* Food for Thought * [link]
@JEG2 » 07 Aug '12, 4pm
RT @thibaut_barrere: Always define respond_to_missing? when overriding method_missing [link] (via @JEG2)
@thibaut_barrere » 07 Aug '12, 4pm
Always define respond_to_missing? when overriding method_missing [link] (via @JEG2)
@thomaspeklak » 07 Aug '12, 6am
Always define respond_to_missing? when overriding method_missing [link] (via Instapaper)
@oriolgual » 02 Aug '12, 5am
RT @elight: For the next time you redefine method_missing. [link]
@elight » 02 Aug '12, 5am
For the next time you redefine method_missing. [link]
@almeidafabiano » 02 Aug '12, 2am
RT @AkitaOnRails: Always define respond_to_missing? when overriding method_missing [link]
@justinko » 01 Aug '12, 3pm
@saturnflyer @avdi I just read this: [link]
@jugyo » 31 Jul '12, 11pm
link: Always define respond_to_missing? when overriding method_missing [link]
@tomohi_ro » 31 Jul '12, 4pm
respont_to_missing? / Always define respond_to_missing? when overriding method_missing [link]
@softcraft » 31 Jul '12, 1pm
RT @teflonted: Always define respond_to_missing? when overriding method_missing [link] via @zite
@teflonted » 31 Jul '12, 11am
Always define respond_to_missing? when overriding method_missing [link] via @zite
@madtrick » 31 Jul '12, 7am
RT @davidbarral: Always define respond_to_missing? when overriding method_missing [link]
@pda » 31 Jul '12, 6am
Didn’t know about the #respond_to_missing? method in Ruby 1.9. I like it. [link]
@Hexa » 31 Jul '12, 5am
RT @t_wada: method_missing を使うときは respond_to_missing? もオーバーライドすべしという話 / “Always define respond_to_missing? when overriding method…” [link]
@t_wada » 31 Jul '12, 5am
method_missing を使うときは respond_to_missing? もオーバーライドすべしという話 / “Always define respond_to_missing? when overriding method…” [link]
@practicingruby » 31 Jul '12, 4am
RT @pzol: Always define respond_to_missing? when overriding method_missing [link]
@netwillnet » 31 Jul '12, 1am
ruby1.9.2以降だと respond_to_missing? なんてあるのか / “Always define respond_to_missing? when overriding method_missing” [link]
@stevie_chambers » 30 Jul '12, 11pm
RT @rubyalert: Always define respond_to_missing? when overriding method_missing: [link]
@ischroedi » 30 Jul '12, 5pm
thoughtbot news: Always define respond_to_missing? when overriding method_missing: method_m... [link] [link]
@sobrinho » 30 Jul '12, 1pm
RT @thoughtbot: Always define respond_to_missing? when overriding method_missing [link]
@thoughtbot » 30 Jul '12, 1pm
Always define respond_to_missing? when overriding method_missing [link]
@id_ruby » 31 Jul '12, 4am
Always define respond_to_missing? when overriding method_missing [link]
@rbudiharso » 31 Jul '12, 4am
Always define respond_to_missing? when overriding method_missing [link]
@pzol » 31 Jul '12, 3am
Always define respond_to_missing? when overriding method_missing [link]
@wRubynews » 31 Jul '12, 3am
Always define respond_to_missing? when overriding method_missing [link]
@wPGnews » 31 Jul '12, 2am
Always define respond_to_missing? when overriding method_missing [link]
@rubyalert » 30 Jul '12, 11pm
Always define respond_to_missing? when overriding method_missing: [link]
@ivivewebs » 30 Jul '12, 11pm
Always define respond_to_missing? when overriding method_missing: [link]
@camwest » 30 Jul '12, 10pm
Always define respond_to_missing? when overriding method_missing [link]
@delicerubyrails » 30 Jul '12, 10pm
Always define respond_to_missing? when overriding method_missing: [link]
@ProxyGear » 30 Jul '12, 9pm
RT @thoughtbot: Always define respond_to_missing? when overriding method_missing [link]
@davidbarral » 30 Jul '12, 8pm
Always define respond_to_missing? when overriding method_missing [link]
@usubov » 30 Jul '12, 7pm
Always define respond_to_missing? when overriding method_missing [link]
@planetonrails » 30 Jul '12, 5pm
Always define respond_to_missing? when overriding method_missing [link]
@ptzn » 30 Jul '12, 5pm
Always define respond_to_missing? when overriding method_missing [link]
@rjacoby » 30 Jul '12, 5pm
RT @thoughtbot: Always define respond_to_missing? when overriding method_missing [link]
@varchar » 30 Jul '12, 4pm
RT @thoughtbot: Always define respond_to_missing? when overriding method_missing [link]
@AlyBadawy » 30 Jul '12, 3pm
RT @thoughtbot: Always define respond_to_missing? when overriding method_missing [link]
@tobiasbuehlmann » 30 Jul '12, 2pm
RT @thoughtbot: Always define respond_to_missing? when overriding method_missing [link]
@vishnuatrai » 30 Jul '12, 2pm
RT @thoughtbot: Always define respond_to_missing? when overriding method_missing [link]