is random; therefore it may be called against the subclass mapper first, so need to check .concrete on both sides, references #3630
a base class and a concrete-inherited subclass would raise an error if those relationships were set up using "backref", while setting up the identical configuration using relationship() instead with the conflicting names would succeed, as is allowed in the case of a concrete mapping. fixes #3630
Includes removal of adapt_like_to_iterable() as well as _set_iterable(), uses __slots__ for collectionadapter, does much less duck typing of collections.
primary key before emitting an INSERT, and merges distinct objects with duplicate primary keys together as they are encountered, which is essentially semi-deterministic at best. This behavior matches what happens already with persistent objects. fixes #3601
relationship flag; this flag *does* have an effect when the baked lazy loader plugin has been invoked. clarify the intent of this flag as an "opt out" but only has an effect when the baked system is loaded anyway. fixes #3572
all DBs now support ON UPDATE CASCADE other than Oracle, there's no need to try to reimplement more functionality here and users should be encouraged to forego natural PKs unless their target platform supports them. references #2666
exprssed -> expressed
to transient objects with attributes unset would leak NEVER_SET, and negated_contains_or_equals would do so for any transient object as the comparison used only the committed value. Repaired the NEVER_SET cases, fixes #3371, and also made negated_contains_or_equals() use state_attr_by_column() just like a non-negated comparison, fixes #3374
determining remote side with semi-self-referential (e.g. two joined inh subclasses referring to each other), non-simple join conditions such that the parententity is taken into account and can reduce the need for using the ``remote()`` annotation; this can restore some cases that might have worked without the annotation prior to 0.9.4 via :ticket:`2948`. fixes #3364