Merge pull request #454 from dlee/nested_indifferent_access

indifferent access should recurse Hash subclasses

1 files changed, 12 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb b/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
index aad4b61e16..c2a6476604 100644
--- a/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
+++ b/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
@@ -9,4 +9,16 @@ class Hash
   def with_indifferent_access
     ActiveSupport::HashWithIndifferentAccess.new_from_hash_copying_default(self)
   end
+
+  # Called when object is nested under an object that receives
+  # #with_indifferent_access. This method with be called on the current object
+  # by the enclosing object and is aliased to #with_indifferent_access by
+  # default. Subclasses of Hash may overwrite this method to return +self+ if
+  # converting to an +ActiveSupport::HashWithIndifferentAccess+ would not be
+  # desirable.
+  #
+  #   b = {:b => 1}
+  #   {:a => b}.with_indifferent_access["a"] # calls b.nested_under_indifferent_access
+  #
+  alias nested_under_indifferent_access with_indifferent_access
 end