module ActiveRecord::Locking::Optimistic

def _update_row(attribute_names, attempted_action = "update")
  return super unless locking_enabled?
  begin
    locking_column = self.class.locking_column
    lock_attribute_was = @attributes[locking_column]
    update_constraints = _query_constraints_hash
    attribute_names = attribute_names.dup if attribute_names.frozen?
    attribute_names << locking_column
    self[locking_column] += 1
    affected_rows = self.class._update_record(
      attributes_with_values(attribute_names),
      update_constraints
    )
    if affected_rows != 1
      raise ActiveRecord::StaleObjectError.new(self, attempted_action)
    end
    affected_rows
  # If something went wrong, revert the locking_column value.
  rescue Exception
    @attributes[locking_column] = lock_attribute_was
    raise
  end
end