Check for `method_missing` in public and protected

Ruby 2.0 changed the behavior of `respond_to?` without argument to
return only search for public method. We actually want to perform the
action only if `method_missing` is either in public or protected.

1 files changed, 2 insertions, 1 deletions

diff --git a/actionpack/lib/action_controller/metal/compatibility.rb b/actionpack/lib/action_controller/metal/compatibility.rb
index de3354d4f9..9d1ff8cbe4 100644
--- a/actionpack/lib/action_controller/metal/compatibility.rb
+++ b/actionpack/lib/action_controller/metal/compatibility.rb
@@ -58,7 +58,8 @@ module ActionController
     end
 
     def method_for_action(action_name)
-      super || (respond_to?(:method_missing) && "_handle_method_missing")
+      super || ((self.class.public_method_defined?(:method_missing) ||
+        self.class.protected_method_defined?(:method_missing)) && "_handle_method_missing")
     end
   end
 end