Move `attributes_before_type_cast` to `AttributeSet`

activerecord/lib/active_record/attribute_methods/before_type_cast.rb

@@ -59,7 +59,7 @@ module ActiveRecord
       #   task.attributes_before_type_cast
       #   # => {"id"=>nil, "title"=>nil, "is_done"=>true, "completed_on"=>"2012-10-21", "created_at"=>nil, "updated_at"=>nil}
       def attributes_before_type_cast
-        @attributes.each_with_object({}) { |(k, v), h| h[k] = v.value_before_type_cast }
+        @attributes.values_before_type_cast
       end
 
       private

activerecord/lib/active_record/attribute_set.rb

@@ -1,11 +1,15 @@
 module ActiveRecord
   class AttributeSet # :nodoc:
-    delegate :[], :[]=, :fetch, :include?, :keys, :each_with_object, to: :attributes
+    delegate :[], :[]=, :fetch, :include?, :keys, to: :attributes
 
     def initialize(attributes)
       @attributes = attributes
     end
 
+    def values_before_type_cast
+      attributes.each_with_object({}) { |(k, v), h| h[k] = v.value_before_type_cast }
+    end
+
     def update(other)
       attributes.update(other.attributes)
     end

activerecord/test/cases/attribute_set_test.rb

@@ -45,5 +45,12 @@ module ActiveRecord
       assert clone.frozen?
       assert_not attributes.frozen?
     end
+
+    test "values_before_type_cast" do
+      builder = AttributeSet::Builder.new(foo: Type::Integer.new, bar: Type::Integer.new)
+      attributes = builder.build_from_database(foo: '1.1', bar: '2.2')
+
+      assert_equal({ foo: '1.1', bar: '2.2' }, attributes.values_before_type_cast)
+    end
   end
 end