Action Record
Rails 6.1 adds *_previously_was attribute methods
Rails 6.1 dirty tracks the previous attribute value after the model is saved or reset.
ReadRails 6 adds ActiveRecord::Relation#annotate
Rails 6 allow adding comments to the SQL queries generated by the ActiveRecord::Relation instance.
ReadRails 6 adds delete_by, destroy_by ActiveRecord::Relation
Rails 6 adds delete_by, destroy_by methods to find and destroy/delete ActiveRecord::Relation records.
ReadRails 6 adds negative scopes on enum
Rails 6 now by default adds negative enum scopes to filter records easily.
ReadRails 5 Active Record attributes API
Rails 5 makes the attribute API public to converts the attribute value to an appropriate Ruby type.
Read