ruby on rails - custom method_missing ignored if instance is defined via an ActiveRecord association -

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i have submissions might in various states , wrote method_missing override allows me check state calls 

submission.draft? submission.published?

this works wonderfully.

i also, various reasons might not great, have model called packlet belongs_to meeting , belongs_to submission. however, surprised find that

packlet.submission.draft?

returns nomethoderror. on other hand, if hard-code #draft? method submission, above method call works.

how method_missing methods recognized when instance defined via activerecord association?

have added draft? method respond_to? method object? guess issue might arise there. happens when type:

 submission.respond_to?(:draft?)

to fix this, write respond_to? method this:

 def respond_to?(method, include_priv = false) #:nodoc:   case method.to_sym   when :draft?, :published?     true   else     super(method, include_priv)   end end

my recommendation implement without using method_missing instead though, doing meta-programming this:

 class submission   [:draft, :published].each |status|     define_method "#{status}?"       status == "#{status}?"     end   end end

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