Method rollback

lib/sqlalchemy/orm/session.py:2019–2038

Rollback the current transaction in progress. If no transaction is in progress, this method is a pass-through. The method always rolls back the topmost database transaction, discarding any nested transactions that may be in progress. .. seealso::

(self)

        return self.begin(nested=True)

    def rollback(self) -> None:
        """Rollback the current transaction in progress.

        If no transaction is in progress, this method is a pass-through.

        The method always rolls back
        the topmost database transaction, discarding any nested
        transactions that may be in progress.

        .. seealso::

            :ref:`session_rollback`

            :ref:`unitofwork_transaction`

        """
        if self._transaction is None:
            pass
        else:
            self._transaction.rollback(_to_root=True)

    def commit(self) -> None:
        """Flush pending changes and commit the current transaction.