Added new attribute event :meth:`.AttributeEvents.bulk_replace`.
This event is triggered when a collection is assigned to a
relationship, before the incoming collection is compared with the
existing one. This early event allows for conversion of incoming
non-ORM objects as well. The event is integrated with the
``@validates`` decorator.
The ``@validates`` decorator now allows the decorated method to receive
objects from a "bulk collection set" operation that have not yet
been compared to the existing collection. This allows incoming values
to be converted to compatible ORM objects as is already allowed
from an "append" event. Note that this means that the
``@validates`` method is called for **all** values during a collection
assignment, rather than just the ones that are new.
Change-Id: I27f59db008d9e521d31a3e30143d7cd997e4b7b3
Fixes: #3896
Two @validates decorators that make use of the same name
is not supported. Raise an exception.
Change-Id: Ia3e89ffdc9ef345a0de258e2ac0ac5e0bd421c61
Fixes: #3776
:func:`.validates` function; when set to False, a validation event
will not be triggered if the event was initated as a backref to
an attribute operation from the other side. [ticket:1535]
- break out validation tests into an updated module test_validators
Mike Bayer