Execute after any rollback has occurred, including "soft" rollbacks that don't actually emit at the DBAPI level. This corresponds to both nested and outer rollbacks, i.e. the innermost rollback that calls the DBAPI's rollback() method, as well as the enclosing rollba
(
self, session: Session, previous_transaction: SessionTransaction
)
| 1898 | """ |
| 1899 | |
| 1900 | def after_soft_rollback( |
| 1901 | self, session: Session, previous_transaction: SessionTransaction |
| 1902 | ) -> None: |
| 1903 | """Execute after any rollback has occurred, including "soft" |
| 1904 | rollbacks that don't actually emit at the DBAPI level. |
| 1905 | |
| 1906 | This corresponds to both nested and outer rollbacks, i.e. |
| 1907 | the innermost rollback that calls the DBAPI's |
| 1908 | rollback() method, as well as the enclosing rollback |
| 1909 | calls that only pop themselves from the transaction stack. |
| 1910 | |
| 1911 | The given :class:`.Session` can be used to invoke SQL and |
| 1912 | :meth:`.Session.query` operations after an outermost rollback |
| 1913 | by first checking the :attr:`.Session.is_active` flag:: |
| 1914 | |
| 1915 | @event.listens_for(Session, "after_soft_rollback") |
| 1916 | def do_something(session, previous_transaction): |
| 1917 | if session.is_active: |
| 1918 | session.execute(text("select * from some_table")) |
| 1919 | |
| 1920 | :param session: The target :class:`.Session`. |
| 1921 | :param previous_transaction: The :class:`.SessionTransaction` |
| 1922 | transactional marker object which was just closed. The current |
| 1923 | :class:`.SessionTransaction` for the given :class:`.Session` is |
| 1924 | available via the :attr:`.Session.transaction` attribute. |
| 1925 | |
| 1926 | """ |
| 1927 | |
| 1928 | def before_flush( |
| 1929 | self, |