[orm] [usecase] The _orm.Session.refresh() method will now immediately load a
relationship-bound attribute that is explicitly named within the
_orm.Session.refresh.attribute_names collection even if it is
currently linked to the "select" loader, which normally is a "lazy" loader
that does not fire off during a refresh. The "lazy loader" strategy will
now detect that the operation is specifically a user-initiated
_orm.Session.refresh() operation which named this attribute
explicitly, and will then call upon the "immediateload" strategy to
actually emit SQL to load the attribute. This should be helpful in
particular for some asyncio situations where the loading of an unloaded
lazy-loaded attribute must be forced, without using the actual lazy-loading
attribute pattern not supported in asyncio.
[orm] [bug] [regression] Fixed regression introduced in version 2.0.2 due to #9217 where
using DML RETURNING statements, as well as
_sql.Select.from_statement() constructs as was "fixed" in
#9217, in conjunction with ORM mapped classes that used
expressions such as with _orm.column_property(), would lead to an
internal error within Core where it would attempt to match the expression
by name. The fix repairs the Core issue, and also adjusts the fix in
#9217 to not take effect for the DML RETURNING use case, where it
adds unnecessary overhead.
[orm] [bug] Marked the internal EvaluatorCompiler module as private to the ORM, and
renamed it to _EvaluatorCompiler. For users that may have been relying
upon this, the name EvaluatorCompiler is still present, however this
use is not supported and will be removed in a future release.
[orm] [use_case] To accommodate a change in column ordering used by ORM Declarative in
SQLAlchemy 2.0, a new parameter _orm.mapped_column.sort_order
has been added that can be used to control the order of the columns defined
in the table by the ORM, for common use cases such as mixins with primary
key columns that should appear first in tables. The change notes at
change_9297 illustrate the default change in ordering behavior
(which is part of all SQLAlchemy 2.0 releases) as well as use of the
_orm.mapped_column.sort_order to control column ordering when
using mixins and multiple classes (new in 2.0.4).
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Updates the requirements on sqlalchemy to permit the latest version.
Release notes
Sourced from sqlalchemy's releases.
... (truncated)
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