[orm] [bug] Fixed issue when using _orm.relationship.cascade_backrefs
parameter set to False, which per change_5150 is set to become
the standard behavior in SQLAlchemy 2.0, where adding the item to a
collection that uniquifies, such as set or dict would fail to fire
a cascade event if the object were already associated in that collection
via the backref. This fix represents a fundamental change in the collection
mechanics by introducing a new event state which can fire off for a
collection mutation even if there is no net change on the collection; the
action is now suited using a new event hook
_orm.AttributeEvents.append_wo_mutation().
[orm] [bug] [regression] Fixed regression involving clause adaption of labeled ORM compound
elements, such as single-table inheritance discriminator expressions with
conditionals or CASE expressions, which could cause aliased expressions
such as those used in ORM join / joinedload operations to not be adapted
correctly, such as referring to the wrong table in the ON clause in a join.
This change also improves a performance bump that was located within the
process of invoking _sql.Select.join() given an ORM attribute
as a target.
[orm] [bug] [regression] Fixed regression where the full combination of joined inheritance, global
with_polymorphic, self-referential relationship and joined loading would
fail to be able to produce a query with the scope of lazy loads and object
refresh operations that also attempted to render the joined loader.
[orm] [bug] Enhanced the bind resolution rules for _orm.Session.execute() so that
when a non-ORM statement such as an _sql.insert() construct
nonetheless is built against ORM objects, to the greatest degree possible
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Bumps sqlalchemy from 1.3.11 to 1.4.16.
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