destroy_row

# File activerecord/lib/active_record/locking/optimistic.rb, line 119
        def destroy_row
          return super unless locking_enabled?

          locking_column = self.class.locking_column

          affected_rows = self.class._delete_record(
            @primary_key => id_in_database,
            locking_column => _lock_value_for_database(locking_column)
          )

          if affected_rows != 1
            raise ActiveRecord::StaleObjectError.new(self, "destroy")
          end

          affected_rows
        end