1 files changed, 7 insertions, 4 deletions
diff --git a/activemodel/lib/active_model/attribute.rb b/activemodel/lib/active_model/attribute.rb
index b75ff80b31..3f19cda07b 100644
--- a/activemodel/lib/active_model/attribute.rb
+++ b/activemodel/lib/active_model/attribute.rb
@@ -133,10 +133,6 @@ module ActiveModel
     end
 
     protected
-
-      attr_reader :original_attribute
-      alias_method :assigned?, :original_attribute
-
       def original_value_for_database
         if assigned?
           original_attribute.original_value_for_database
@@ -146,6 +142,9 @@ module ActiveModel
       end
 
     private
+      attr_reader :original_attribute
+      alias :assigned? :original_attribute
+
       def initialize_dup(other)
         if defined?(@value) && @value.duplicable?
           @value = @value.dup
@@ -233,6 +232,10 @@ module ActiveModel
           false
         end
 
+        def forgetting_assignment
+          dup
+        end
+
         def with_type(type)
           self.class.new(name, type)
         end