DeprecationWarnings with SQLAlchemy 1.4.0b1

[sallner]

In SQLAlchemy 1.4 a some new DeprecationWarnings were issued.

Most prominent, the old-style method signature of after_bulk_update and after_bulk_delete changed to a take a [update|delete]_context similar to after_flush https://github.com/zopefoundation/zope.sqlalchemy/blob/master/src/zope/sqlalchemy/datamanager.py#L280-L284

This style was introduced in version 0.9 and would also require to bump the minimal required version of SQLAlchemy to this version. https://docs.sqlalchemy.org/en/14/orm/events.html?highlight=after_bulk_update#sqlalchemy.orm.SessionEvents.after_bulk_delete

[Spindel]

There's a few more that I find:

python3.9/site-packages/zope/sqlalchemy/datamanager.py:83: RemovedIn20Warning: The Session.transaction attribute is considered legacy as of the 1.x series of SQLAlchemy and will be removed in 2.0. For context manager use, use Session.begin().  To access the current root transaction, use Session.get_transaction(). (Background on SQLAlchemy 2.0 at: http://sqlalche.me/e/b8d9)
   getattr(session.transaction, "_iterate_self_and_parents", None)

And

python3.9/site-packages/zope/sqlalchemy/datamanager.py:288: RemovedIn20Warning: The Session.transaction attribute is considered legacy as of the 1.x series of SQLAlchemy and will be removed in 2.0. For context manager use, use Session.begin().  To access the current root transaction, use Session.get_transaction(). (Background on SQLAlchemy 2.0 at: http://sqlalche.me/e/b8d9)
    session.transaction.nested