Make restore_attributes public

Also make it accept a list of attributes to be changed. This will make
possible to restore only a subset of the changed attributes.

Closes #16203

1 files changed, 5 insertions, 5 deletions

diff --git a/activemodel/lib/active_model/dirty.rb b/activemodel/lib/active_model/dirty.rb
index 24214187af..d11243c4c0 100644
--- a/activemodel/lib/active_model/dirty.rb
+++ b/activemodel/lib/active_model/dirty.rb
@@ -180,6 +180,11 @@ module ActiveModel
       attribute_changed?(attr) ? changed_attributes[attr] : __send__(attr)
     end
 
+    # Restore all previous data of the provided attributes.
+    def restore_attributes(attributes = changed)
+      attributes.each { |attr| restore_attribute! attr }
+    end
+
     private
 
       # Removes current changes and makes them accessible through +previous_changes+.
@@ -199,11 +204,6 @@ module ActiveModel
         clear_changes_information
       end
 
-      # Restore all previous data.
-      def restore_attributes # :doc:
-        changed_attributes.each_key { |attr| restore_attribute! attr }
-      end
-
       # Handle <tt>*_change</tt> for +method_missing+.
       def attribute_change(attr)
         [changed_attributes[attr], __send__(attr)] if attribute_changed?(attr)