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-rw-r--r--activesupport/lib/active_support/hash_with_indifferent_access.rb3
-rw-r--r--activesupport/test/core_ext/hash_ext_test.rb7
2 files changed, 9 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/hash_with_indifferent_access.rb b/activesupport/lib/active_support/hash_with_indifferent_access.rb
index 6e1c0da991..bb47b3560a 100644
--- a/activesupport/lib/active_support/hash_with_indifferent_access.rb
+++ b/activesupport/lib/active_support/hash_with_indifferent_access.rb
@@ -164,7 +164,8 @@ module ActiveSupport
if value.is_a? Hash
value.nested_under_indifferent_access
elsif value.is_a?(Array)
- value.dup.replace(value.map { |e| convert_value(e) })
+ value = value.dup if value.frozen?
+ value.replace(value.map { |e| convert_value(e) })
else
value
end
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index 5d422ce5ad..4dc9f57038 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -457,6 +457,13 @@ class HashExtTest < ActiveSupport::TestCase
assert_equal '1234', roundtrip.default
end
+ def test_lookup_returns_the_same_object_that_is_stored_in_hash_indifferent_access
+ hash = HashWithIndifferentAccess.new {|h, k| h[k] = []}
+ hash[:a] << 1
+
+ assert_equal [1], hash[:a]
+ end
+
def test_indifferent_hash_with_array_of_hashes
hash = { "urls" => { "url" => [ { "address" => "1" }, { "address" => "2" } ] }}.with_indifferent_access
assert_equal "1", hash[:urls][:url].first[:address]