1 files changed, 9 insertions, 7 deletions
diff --git a/activerecord/lib/active_record/attribute_set.rb b/activerecord/lib/active_record/attribute_set.rb
index 720d5f8b7c..66b278219a 100644
--- a/activerecord/lib/active_record/attribute_set.rb
+++ b/activerecord/lib/active_record/attribute_set.rb
@@ -1,9 +1,9 @@
-require 'active_record/attribute_set/builder'
-require 'active_record/attribute_set/yaml_encoder'
+require "active_record/attribute_set/builder"
+require "active_record/attribute_set/yaml_encoder"
 
 module ActiveRecord
   class AttributeSet # :nodoc:
-    delegate :each_value, to: :attributes
+    delegate :each_value, :fetch, to: :attributes
 
     def initialize(attributes)
       @attributes = attributes
@@ -98,14 +98,16 @@ module ActiveRecord
       attributes == other.attributes
     end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
-    attr_reader :attributes
+      attr_reader :attributes
 
     private
 
-    def initialized_attributes
-      attributes.select { |_, attr| attr.initialized? }
-    end
+      def initialized_attributes
+        attributes.select { |_, attr| attr.initialized? }
+      end
   end
 end