Method begin

lib/sqlalchemy/orm/session.py:5105–5125

Produce a context manager that both provides a new :class:`_orm.Session` as well as a transaction that commits. e.g.:: Session = sessionmaker(some_engine) with Session.begin() as session: session.add(some_object) # commits tran

(self)

        self.class_ = type(class_.__name__, (class_,), {})

    def begin(self) -> contextlib.AbstractContextManager[_S]:
        """Produce a context manager that both provides a new
        :class:`_orm.Session` as well as a transaction that commits.


        e.g.::

            Session = sessionmaker(some_engine)

            with Session.begin() as session:
                session.add(some_object)

            # commits transaction, closes session

        .. versionadded:: 1.4


        """

        session = self()
        return session._maker_context_manager()

    def __call__(self, **local_kw: Any) -> _S:
        """Produce a new :class:`.Session` object using the configuration