Changelog
### 3.0.2
```
This is a fix release for the 3.0.x feature release branch. It fixes bugs but does not otherwise change behavior and should not result in breaking changes.
* Changes: https://flask.palletsprojects.com/en/3.0.x/changes/#version-3.0.2
* Milestone: https://github.com/pallets/flask/milestone/34?closed=1
* PyPI: https://pypi.org/project/Flask/3.0.2/
```
### 3.0.1
```
This is a fix release for the 3.0.x feature release branch.
Fixes an issue where using other JSON providers, such as `flask-orjson`, previously caused loaded session data to have an incorrect format in some cases.
* Changes: https://flask.palletsprojects.com/en/3.0.x/changes/#version-3-0-1
* Milestone: https://github.com/pallets/flask/milestone/32?closed=1
* PyPI: https://pypi.org/project/Flask/3.0.1/
```
### 3.0.0
```
This is a feature release, which includes new features, removes previously deprecated code, and adds new deprecations. The 3.0.x branch is now the supported fix branch, the 2.3.x branch will become a tag marking the end of support for that branch. We encourage everyone to upgrade, and to use a tool such as [pip-tools](https://pypi.org/project/pip-tools/) to pin all dependencies and control upgrades. Test with warnings treated as errors to be able to adapt to deprecation warnings early.
* Changes: https://flask.palletsprojects.com/en/3.0.x/changes/#version-3-0-0
* Milestone: https://github.com/pallets/flask/milestone/20?closed=1
```
### 2.3.3
```
This is a fix release for the 2.3.x feature branch.
- Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-3
- Milestone: https://github.com/pallets/flask/milestone/31?closed=1
```
### 2.3.2
```
This is a security fix release for the 2.3.x release branch.
* Security advisory: https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq, CVE-2023-30861
* Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-2
* Milestone: https://github.com/pallets/flask/milestone/29?closed=1
```
### 2.3.1
```
This is a fix release for the 2.3.x release branch.
* Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-1
* Milestone: https://github.com/pallets/flask/milestone/28?closed=1
```
### 2.3.0
```
This is a feature release, which includes new features, removes previously deprecated code, and adds new deprecations. The 2.3.x branch is now the supported fix branch, the 2.2.x branch will become a tag marking the end of support for that branch. We encourage everyone to upgrade, and to use a tool such as [pip-tools](https://pypi.org/project/pip-tools/) to pin all dependencies and control upgrades. Test with warnings treated as errors to be able to adapt to deprecation warnings early.
* Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-0
* Milestone: https://github.com/pallets/flask/milestone/24?closed=1
```
### 2.2.5
```
This is a security fix release for the 2.2.x release branch. Note that 2.3.x is the currently supported release branch; please upgrade to the latest version if possible.
* Security advisory: https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq, CVE-2023-30861
* Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-5
* Milestone: https://github.com/pallets/flask/milestone/30?closed=1
```
### 2.2.4
```
This is a fix release for the 2.2.x release branch.
* Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-4
* Milestone: https://github.com/pallets/flask/milestone/27?closed=1
```
### 2.2.3
```
This is a fix release for the 2.2.x release branch.
* Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-3
* Milestone: https://github.com/pallets/flask/milestone/26?closed=1
```
### 2.2.2
```
This is a fix release for the [2.2.0](https://github.com/pallets/flask/releases/tag/2.2.0) feature release.
* Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-2
* Milestone: https://github.com/pallets/flask/milestone/25?closed=1
```
### 2.2.1
```
This is a fix release for the [2.2.0](https://github.com/pallets/flask/releases/tag/2.2.0) feature release.
* Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-1
* Milestone: https://github.com/pallets/flask/milestone/23?closed=1
```
### 2.2.0
```
This is a feature release, which includes new features and removes previously deprecated code. The 2.2.x branch is now the supported bug fix branch, the 2.1.x branch will become a tag marking the end of support for that branch. We encourage everyone to upgrade, and to use a tool such as [pip-tools](https://pypi.org/project/pip-tools/) to pin all dependencies and control upgrades.
* Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-0
* Milestone: https://github.com/pallets/flask/milestone/19?closed=1
```
### 2.1.3
```
* Changes: https://flask.palletsprojects.com/en/2.1.x/changes/#version-2-1-3
* Milestone: https://github.com/pallets/flask/milestone/22?closed=1
```
### 2.1.2
```
This is a fix release for the [2.1.0](https://github.com/pallets/flask/releases/tag/2.1.0) feature release.
* Changes: https://flask.palletsprojects.com/en/2.1.x/changes/#version-2-1-2
* Milestone: https://github.com/pallets/flask/milestone/21?closed=1
```
### 2.1.1
```
This is a fix release for the [2.1.0](https://github.com/pallets/flask/releases/tag/2.1.0) feature release.
* Changes: https://flask.palletsprojects.com/en/2.1.x/changes/#version-2-1-1
* Milestone: https://github.com/pallets/flask/milestone/18?closed=1
```
### 2.1.0
```
This is a feature release, which includes new features and removes previously deprecated features. The 2.1.x branch is now the supported bugfix branch, the 2.0.x branch will become a tag marking the end of support for that branch. We encourage everyone to upgrade, and to use a tool such as [pip-tools](https://pypi.org/project/pip-tools/) to pin all dependencies and control upgrades.
* Changes: https://flask.palletsprojects.com/en/2.1.x/changes/#version-2-1-0
* Milestone: https://github.com/pallets/flask/milestone/13?closed=1
We also encourage upgrading to the latest versions of the other Pallets projects as well.
* Werkzeug 2.1 changes: https://werkzeug.palletsprojects.com/en/2.1.x/changes/#version-2-1-0
* Jinja 3.1 changes: https://jinja.palletsprojects.com/en/3.1.x/changes/#version-3-1-1
* Click 8.1 changes: https://click.palletsprojects.com/en/8.1.x/changes/#version-8-1-0
* MarkupSafe 2.1 changes: https://markupsafe.palletsprojects.com/en/2.1.x/changes/#version-2-1-1
* ItsDangerous 2.1 changes: https://itsdangerous.palletsprojects.com/en/2.1.x/changes/#version-2-1-2
```
### 2.0.3
```
* Changes: https://flask.palletsprojects.com/en/2.0.x/changes/#version-2-0-3
* Milestone: https://github.com/pallets/flask/milestone/17?closed=1
```
### 2.0.2
```
* Changes: https://flask.palletsprojects.com/en/2.0.x/changes/#version-2-0-2
```
### 2.0.1
```
* Changes: https://flask.palletsprojects.com/en/2.0.x/changes/#version-2-0-1
```
### 2.0.0
```
New major versions of all the core Pallets libraries, including Flask 2.0, have been released! :tada:
* Read the announcement on our blog: https://palletsprojects.com/blog/flask-2-0-released/
* Read the full list of changes: https://flask.palletsprojects.com/changes/#version-2-0-0
* Retweet the announcement on Twitter: https://twitter.com/PalletsTeam/status/1392266507296514048
* Follow our blog, Twitter, or GitHub to see future announcements.
This represents a significant amount of work, and there are quite a few changes. Be sure to carefully read the changelog, and use tools such as pip-compile and Dependabot to pin your dependencies and control your updates.
```
### 2.0.0rc2
```
* Changes: https://flask.palletsprojects.com/en/master/changes#version-2-0-0
```
### 2.0.0rc1
```
* Changes: https://flask.palletsprojects.com/en/master/changes/#version-2-0-0
```
Links
- PyPI: https://pypi.org/project/flask
- Changelog: https://data.safetycli.com/changelogs/flask/
Changelog
### 3.1.1
```
-------------
Released 2023-09-11
- Deprecate the ``__version__`` attribute. Use feature detection, or
``importlib.metadata.version("flask-sqlalchemy")``, instead. :issue:`5230`
```
### 3.1.0
```
-------------
Released 2023-09-11
- Drop support for Python 3.7. :pr:`1251`
- Add support for the SQLAlchemy 2.x API via ``model_class`` parameter. :issue:`1140`
- Bump minimum version of SQLAlchemy to 2.0.16.
- Remove previously deprecated code.
- Pass extra keyword arguments from ``get_or_404`` to ``session.get``. :issue:`1149`
- Fix bug with finding right bind key for clause statements. :issue:`1211`
```
### 3.0.5
```
-------------
Released 2023-06-21
- ``Pagination.next()`` enforces ``max_per_page``. :issue:`1201`
- Improve type hint for ``get_or_404`` return value to be non-optional. :pr:`1226`
```
### 3.0.4
```
-------------
Released 2023-06-19
- Fix type hint for ``get_or_404`` return value. :pr:`1208`
- Fix type hints for pyright (used by VS Code Pylance extension). :issue:`1205`
```
### 3.0.3
```
-------------
Released 2023-01-31
- Show helpful errors when mistakenly using multiple ``SQLAlchemy`` instances for the
same app, or without calling ``init_app``. :pr:`1151`
- Fix issue with getting the engine associated with a model that uses polymorphic
table inheritance. :issue:`1155`
```
### 3.0.2
```
-------------
Released 2022-10-14
- Update compatibility with SQLAlchemy 2. :issue:`1122`
```
### 3.0.1
```
-------------
Released 2022-10-11
- Export typing information instead of using external typeshed definitions.
:issue:`1112`
- If default engine options are set, but ``SQLALCHEMY_DATABASE_URI`` is not set, an
invalid default bind will not be configured. :issue:`1117`
```
### 3.0.0
```
-------------
Released 2022-10-04
- Drop support for Python 2, 3.4, 3.5, and 3.6.
- Bump minimum version of Flask to 2.2.
- Bump minimum version of SQLAlchemy to 1.4.18.
- Remove previously deprecated code.
- The session is scoped to the current app context instead of the thread. This
requires that an app context is active. This ensures that the session is cleaned up
after every request.
- An active Flask application context is always required to access ``session`` and
``engine``, regardless of if an application was passed to the constructor.
:issue:`508, 944`
- Different bind keys use different SQLAlchemy ``MetaData`` registries, allowing
tables in different databases to have the same name. Bind keys are stored and looked
up on the resulting metadata rather than the model or table.
- ``SQLALCHEMY_DATABASE_URI`` does not default to ``sqlite:///:memory:``. An error is
raised if neither it nor ``SQLALCHEMY_BINDS`` define any engines. :pr:`731`
- Configuring SQLite with a relative path is relative to ``app.instance_path`` instead
of ``app.root_path``. The instance folder is created if necessary. :issue:`462`
- Added ``get_or_404``, ``first_or_404``, ``one_or_404``, and ``paginate`` methods to
the extension object. These use SQLAlchemy's preferred ``session.execute(select())``
pattern instead of the legacy query interface. :issue:`1088`
- Setup methods that create the engines and session are renamed with a leading
underscore. They are considered internal interfaces which may change at any time.
- All parameters to ``SQLAlchemy`` except ``app`` are keyword-only.
- Renamed the ``bind`` parameter to ``bind_key`` and removed the ``app`` parameter
from various ``SQLAlchemy`` methods.
- The extension object uses ``__getattr__`` to alias names from the SQLAlchemy
package, rather than copying them as attributes.
- The extension object is stored directly as ``app.extensions["sqlalchemy"]``.
:issue:`698`
- The session class can be customized by passing the ``class_`` key in the
``session_options`` parameter. :issue:`327`
- ``SignallingSession`` is renamed to ``Session``.
- ``Session.get_bind`` more closely matches the base implementation.
- Model classes and the ``db`` instance are available without imports in
``flask shell``. :issue:`1089`
- The ``CamelCase`` to ``snake_case`` table name converter handles more patterns
correctly. If model that was already created in the database changed, either use
Alembic to rename the table, or set ``__tablename__`` to keep the old name.
:issue:`406`
- ``Model`` ``repr`` distinguishes between transient and pending instances.
:issue:`967`
- A custom model class can implement ``__init_subclass__`` with class parameters.
:issue:`1002`
- ``db.Table`` is a subclass instead of a function.
- The ``engine_options`` parameter is applied as defaults before per-engine
configuration.
- ``SQLALCHEMY_BINDS`` values can either be an engine URL, or a dict of engine options
including URL, for each bind. ``SQLALCHEMY_DATABASE_URI`` and
``SQLALCHEMY_ENGINE_OPTIONS`` correspond to the ``None`` key and take precedence.
:issue:`783`
- Engines are created when calling ``init_app`` rather than the first time they are
accessed. :issue:`698`
- ``db.engines`` exposes the map of bind keys to engines for the current app.
- ``get_engine``, ``get_tables_for_bind``, and ``get_binds`` are deprecated.
- SQLite driver-level URIs that look like ``sqlite:///file:name.db?uri=true`` are
supported. :issue:`998, 1045`
- SQLite engines do not use ``NullPool`` if ``pool_size`` is 0.
- MySQL engines use the "utf8mb4" charset by default. :issue:`875`
- MySQL engines do not set ``pool_size`` to 10.
- MySQL engines don't set a default for ``pool_recycle`` if not using a queue pool.
:issue:`803`
- ``Query`` is renamed from ``BaseQuery``.
- Added ``Query.one_or_404``.
- The query class is applied to ``backref`` in ``relationship``. :issue:`417`
- Creating ``Pagination`` objects manually is no longer a public API. They should be
created with ``db.paginate`` or ``query.paginate``. :issue:`1088`
- ``Pagination.iter_pages`` and ``Query.paginate`` parameters are keyword-only.
- ``Pagination`` is iterable, iterating over its items. :issue:`70`
- Pagination count query is more efficient.
- ``Pagination.iter_pages`` is more efficient. :issue:`622`
- ``Pagination.iter_pages`` ``right_current`` parameter is inclusive.
- Pagination ``per_page`` cannot be 0. :issue:`1091`
- Pagination ``max_per_page`` defaults to 100. :issue:`1091`
- Added ``Pagination.first`` and ``last`` properties, which give the number of the
first and last item on the page. :issue:`567`
- ``SQLALCHEMY_RECORD_QUERIES`` is disabled by default, and is not enabled
automatically with ``app.debug`` or ``app.testing``. :issue:`1092`
- ``get_debug_queries`` is renamed to ``get_recorded_queries`` to better match the
config and functionality.
- Recorded query info is a dataclass instead of a tuple. The ``context`` attribute is
renamed to ``location``. Finding the location uses a more inclusive check.
- ``SQLALCHEMY_TRACK_MODIFICATIONS`` is disabled by default. :pr:`727`
- ``SQLALCHEMY_COMMIT_ON_TEARDOWN`` is deprecated. It can cause various design issues
that are difficult to debug. Call ``db.session.commit()`` directly instead.
:issue:`216`
```
### 2.5.1
```
-------------
Released 2021-03-18
- Fix compatibility with Python 2.7.
```
### 2.5.0
```
-------------
Released 2021-03-18
- Update to support SQLAlchemy 1.4.
- SQLAlchemy ``URL`` objects are immutable. Some internal methods have changed to
return a new URL instead of ``None``. :issue:`885`
```
Links
- PyPI: https://pypi.org/project/flask-sqlalchemy
- Changelog: https://data.safetycli.com/changelogs/flask-sqlalchemy/
- Docs: https://pythonhosted.org/Flask-SQLAlchemy/
Changelog
### 2.0.28
```
:released: March 4, 2024
.. change::
:tags: engine, usecase
:tickets: 10974
Added new core execution option
:paramref:`_engine.Connection.execution_options.preserve_rowcount`. When
set, the ``cursor.rowcount`` attribute from the DBAPI cursor will be
unconditionally memoized at statement execution time, so that whatever
value the DBAPI offers for any kind of statement will be available using
the :attr:`_engine.CursorResult.rowcount` attribute from the
:class:`_engine.CursorResult`. This allows the rowcount to be accessed for
statments such as INSERT and SELECT, to the degree supported by the DBAPI
in use. The :ref:`engine_insertmanyvalues` also supports this option and
will ensure :attr:`_engine.CursorResult.rowcount` is correctly set for a
bulk INSERT of rows when set.
.. change::
:tags: bug, orm, regression
:tickets: 11010
Fixed regression caused by :ticket:`9779` where using the "secondary" table
in a relationship ``and_()`` expression would fail to be aliased to match
how the "secondary" table normally renders within a
:meth:`_sql.Select.join` expression, leading to an invalid query.
.. change::
:tags: bug, orm, performance, regression
:tickets: 11085
Adjusted the fix made in :ticket:`10570`, released in 2.0.23, where new
logic was added to reconcile possibly changing bound parameter values
across cache key generations used within the :func:`_orm.with_expression`
construct. The new logic changes the approach by which the new bound
parameter values are associated with the statement, avoiding the need to
deep-copy the statement which can result in a significant performance
penalty for very deep / complex SQL constructs. The new approach no longer
requires this deep-copy step.
.. change::
:tags: bug, asyncio
:tickets: 8771
An error is raised if a :class:`.QueuePool` or other non-asyncio pool class
is passed to :func:`_asyncio.create_async_engine`. This engine only
accepts asyncio-compatible pool classes including
:class:`.AsyncAdaptedQueuePool`. Other pool classes such as
:class:`.NullPool` are compatible with both synchronous and asynchronous
engines as they do not perform any locking.
.. seealso::
:ref:`pool_api`
.. change::
:tags: change, tests
pytest support in the tox.ini file has been updated to support pytest 8.1.
.. changelog::
```
### 2.0.27
```
:released: February 13, 2024
.. change::
:tags: bug, postgresql, regression
:tickets: 11005
Fixed regression caused by just-released fix for :ticket:`10863` where an
invalid exception class were added to the "except" block, which does not
get exercised unless such a catch actually happens. A mock-style test has
been added to ensure this catch is exercised in unit tests.
.. changelog::
```
### 2.0.26
```
:released: February 11, 2024
.. change::
:tags: usecase, postgresql, reflection
:tickets: 10777
Added support for reflection of PostgreSQL CHECK constraints marked with
"NO INHERIT", setting the key ``no_inherit=True`` in the reflected data.
Pull request courtesy Ellis Valentiner.
.. change::
:tags: bug, sql
:tickets: 10843
Fixed issues in :func:`_sql.case` where the logic for determining the
type of the expression could result in :class:`.NullType` if the last
element in the "whens" had no type, or in other cases where the type
could resolve to ``None``. The logic has been updated to scan all
given expressions so that the first non-null type is used, as well as
to always ensure a type is present. Pull request courtesy David Evans.
.. change::
:tags: bug, mysql
:tickets: 10850
Fixed issue where NULL/NOT NULL would not be properly reflected from a
MySQL column that also specified the VIRTUAL or STORED directives. Pull
request courtesy Georg Wicke-Arndt.
.. change::
:tags: bug, regression, postgresql
:tickets: 10863
Fixed regression in the asyncpg dialect caused by :ticket:`10717` in
release 2.0.24 where the change that now attempts to gracefully close the
asyncpg connection before terminating would not fall back to
``terminate()`` for other potential connection-related exceptions other
than a timeout error, not taking into account cases where the graceful
``.close()`` attempt fails for other reasons such as connection errors.
.. change::
:tags: oracle, bug, performance
:tickets: 10877
Changed the default arraysize of the Oracle dialects so that the value set
by the driver is used, that is 100 at the time of writing for both
cx_oracle and oracledb. Previously the value was set to 50 by default. The
setting of 50 could cause significant performance regressions compared to
when using cx_oracle/oracledb alone to fetch many hundreds of rows over
slower networks.
.. change::
:tags: bug, mysql
:tickets: 10893
Fixed issue in asyncio dialects asyncmy and aiomysql, where their
``.close()`` method is apparently not a graceful close. replace with
non-standard ``.ensure_closed()`` method that's awaitable and move
``.close()`` to the so-called "terminate" case.
.. change::
:tags: bug, orm
:tickets: 10896
Replaced the "loader depth is excessively deep" warning with a shorter
message added to the caching badge within SQL logging, for those statements
where the ORM disabled the cache due to a too-deep chain of loader options.
The condition which this warning highlights is difficult to resolve and is
generally just a limitation in the ORM's application of SQL caching. A
future feature may include the ability to tune the threshold where caching
is disabled, but for now the warning will no longer be a nuisance.
.. change::
:tags: bug, orm
:tickets: 10899
Fixed issue where it was not possible to use a type (such as an enum)
within a :class:`_orm.Mapped` container type if that type were declared
locally within the class body. The scope of locals used for the eval now
includes that of the class body itself. In addition, the expression within
:class:`_orm.Mapped` may also refer to the class name itself, if used as a
string or with future annotations mode.
.. change::
:tags: usecase, postgresql
:tickets: 10904
Support the ``USING <method>`` option for PostgreSQL ``CREATE TABLE`` to
specify the access method to use to store the contents for the new table.
Pull request courtesy Edgar Ramírez-Mondragón.
.. seealso::
:ref:`postgresql_table_options`
.. change::
:tags: bug, examples
:tickets: 10920
Fixed regression in history_meta example where the use of
:meth:`_schema.MetaData.to_metadata` to make a copy of the history table
would also copy indexes (which is a good thing), but causing naming
conflicts indexes regardless of naming scheme used for those indexes. A
"_history" suffix is now added to these indexes in the same way as is
achieved for the table name.
.. change::
:tags: bug, orm
:tickets: 10967
Fixed issue where using :meth:`_orm.Session.delete` along with the
:paramref:`_orm.Mapper.version_id_col` feature would fail to use the
correct version identifier in the case that an additional UPDATE were
emitted against the target object as a result of the use of
:paramref:`_orm.relationship.post_update` on the object. The issue is
similar to :ticket:`10800` just fixed in version 2.0.25 for the case of
updates alone.
.. change::
:tags: bug, orm
:tickets: 10990
Fixed issue where an assertion within the implementation for
:func:`_orm.with_expression` would raise if a SQL expression that was not
cacheable were used; this was a 2.0 regression since 1.4.
.. change::
:tags: postgresql, usecase
:tickets: 9736
Correctly type PostgreSQL RANGE and MULTIRANGE types as ``Range[T]``
and ``Sequence[Range[T]]``.
Introduced utility sequence :class:`_postgresql.MultiRange` to allow better
interoperability of MULTIRANGE types.
.. change::
:tags: postgresql, usecase
Differentiate between INT4 and INT8 ranges and multi-ranges types when
inferring the database type from a :class:`_postgresql.Range` or
:class:`_postgresql.MultiRange` instance, preferring INT4 if the values
fit into it.
.. change::
:tags: bug, typing
Fixed the type signature for the :meth:`.PoolEvents.checkin` event to
indicate that the given :class:`.DBAPIConnection` argument may be ``None``
in the case where the connection has been invalidated.
.. change::
:tags: bug, examples
Fixed the performance example scripts in examples/performance to mostly
work with the Oracle database, by adding the :class:`.Identity` construct
to all the tables and allowing primary generation to occur on this backend.
A few of the "raw DBAPI" cases still are not compatible with Oracle.
.. change::
:tags: bug, mssql
Fixed an issue regarding the use of the :class:`.Uuid` datatype with the
:paramref:`.Uuid.as_uuid` parameter set to False, when using the pymssql
dialect. ORM-optimized INSERT statements (e.g. the "insertmanyvalues"
feature) would not correctly align primary key UUID values for bulk INSERT
statements, resulting in errors. Similar issues were fixed for the
PostgreSQL drivers as well.
.. change::
:tags: bug, postgresql
Fixed an issue regarding the use of the :class:`.Uuid` datatype with the
:paramref:`.Uuid.as_uuid` parameter set to False, when using PostgreSQL
dialects. ORM-optimized INSERT statements (e.g. the "insertmanyvalues"
feature) would not correctly align primary key UUID values for bulk INSERT
statements, resulting in errors. Similar issues were fixed for the
pymssql driver as well.
.. changelog::
```
### 2.0.25
```
:released: January 2, 2024
.. change::
:tags: oracle, asyncio
:tickets: 10679
Added support for :ref:`oracledb` in asyncio mode, using the newly released
version of the ``oracledb`` DBAPI that includes asyncio support. For the
2.0 series, this is a preview release, where the current implementation
does not yet have include support for
:meth:`_asyncio.AsyncConnection.stream`. Improved support is planned for
the 2.1 release of SQLAlchemy.
.. change::
:tags: bug, orm
:tickets: 10800
Fixed issue where when making use of the
:paramref:`_orm.relationship.post_update` feature at the same time as using
a mapper version_id_col could lead to a situation where the second UPDATE
statement emitted by the post-update feature would fail to make use of the
correct version identifier, assuming an UPDATE was already emitted in that
flush which had already bumped the version counter.
.. change::
:tags: bug, typing
:tickets: 10801, 10818
Fixed regressions caused by typing added to the ``sqlalchemy.sql.functions``
module in version 2.0.24, as part of :ticket:`6810`:
* Further enhancements to pep-484 typing to allow SQL functions from
:attr:`_sql.func` derived elements to work more effectively with ORM-mapped
attributes (:ticket:`10801`)
* Fixed the argument types passed to functions so that literal expressions
like strings and ints are again interpreted correctly (:ticket:`10818`)
.. change::
:tags: usecase, orm
:tickets: 10807
Added preliminary support for Python 3.12 pep-695 type alias structures,
when resolving custom type maps for ORM Annotated Declarative mappings.
.. change::
:tags: bug, orm
:tickets: 10815
Fixed issue where ORM Annotated Declarative would mis-interpret the left
hand side of a relationship without any collection specified as
uselist=True if the left type were given as a class and not a string,
without using future-style annotations.
.. change::
:tags: bug, sql
:tickets: 10817
Improved compilation of :func:`_sql.any_` / :func:`_sql.all_` in the
context of a negation of boolean comparison, will now render ``NOT (expr)``
rather than reversing the equality operator to not equals, allowing
finer-grained control of negations for these non-typical operators.
.. changelog::
```
### 2.0.24
```
:released: December 28, 2023
.. change::
:tags: bug, orm
:tickets: 10597
Fixed issue where use of :func:`_orm.foreign` annotation on a
non-initialized :func:`_orm.mapped_column` construct would produce an
expression without a type, which was then not updated at initialization
time of the actual column, leading to issues such as relationships not
determining ``use_get`` appropriately.
.. change::
:tags: bug, schema
:tickets: 10654
Fixed issue where error reporting for unexpected schema item when creating
objects like :class:`_schema.Table` would incorrectly handle an argument
that was itself passed as a tuple, leading to a formatting error. The
error message has been modernized to use f-strings.
.. change::
:tags: bug, engine
:tickets: 10662
Fixed URL-encoding of the username and password components of
:class:`.engine.URL` objects when converting them to string using the
:meth:`_engine.URL.render_as_string` method, by using Python standard
library ``urllib.parse.quote`` while allowing for plus signs and spaces to
remain unchanged as supported by SQLAlchemy's non-standard URL parsing,
rather than the legacy home-grown routine from many years ago. Pull request
courtesy of Xavier NUNN.
.. change::
:tags: bug, orm
:tickets: 10668
Improved the error message produced when the unit of work process sets the
value of a primary key column to NULL due to a related object with a
dependency rule on that column being deleted, to include not just the
destination object and column name but also the source column from which
the NULL value is originating. Pull request courtesy Jan Vollmer.
.. change::
:tags: bug, postgresql
:tickets: 10717
Adjusted the asyncpg dialect such that when the ``terminate()`` method is
used to discard an invalidated connection, the dialect will first attempt
to gracefully close the connection using ``.close()`` with a timeout, if
the operation is proceeding within an async event loop context only. This
allows the asyncpg driver to attend to finalizing a ``TimeoutError``
including being able to close a long-running query server side, which
otherwise can keep running after the program has exited.
.. change::
:tags: bug, orm
:tickets: 10732
Modified the ``__init_subclass__()`` method used by
:class:`_orm.MappedAsDataclass`, :class:`_orm.DeclarativeBase` and
:class:`_orm.DeclarativeBaseNoMeta` to accept arbitrary ``**kw`` and to
propagate them to the ``super()`` call, allowing greater flexibility in
arranging custom superclasses and mixins which make use of
``__init_subclass__()`` keyword arguments. Pull request courtesy Michael
Oliver.
.. change::
:tags: bug, tests
:tickets: 10747
Improvements to the test suite to further harden its ability to run
when Python ``greenlet`` is not installed. There is now a tox
target that includes the token "nogreenlet" that will run the suite
with greenlet not installed (note that it still temporarily installs
greenlet as part of the tox config, however).
.. change::
:tags: bug, sql
:tickets: 10753
Fixed issue in stringify for SQL elements, where a specific dialect is not
passed, where a dialect-specific element such as the PostgreSQL "on
conflict do update" construct is encountered and then fails to provide for
a stringify dialect with the appropriate state to render the construct,
leading to internal errors.
.. change::
:tags: bug, sql
Fixed issue where stringifying or compiling a :class:`.CTE` that was
against a DML construct such as an :func:`_sql.insert` construct would fail
to stringify, due to a mis-detection that the statement overall is an
INSERT, leading to internal errors.
.. change::
:tags: bug, orm
:tickets: 10776
Ensured the use case of :class:`.Bundle` objects used in the
``returning()`` portion of ORM-enabled INSERT, UPDATE and DELETE statements
is tested and works fully. This was never explicitly implemented or
tested previously and did not work correctly in the 1.4 series; in the 2.0
series, ORM UPDATE/DELETE with WHERE criteria was missing an implementation
method preventing :class:`.Bundle` objects from working.
.. change::
:tags: bug, orm
:tickets: 10784
Fixed 2.0 regression in :class:`.MutableList` where a routine that detects
sequences would not correctly filter out string or bytes instances, making
it impossible to assign a string value to a specific index (while
non-sequence values would work fine).
.. change::
:tags: change, asyncio
The ``async_fallback`` dialect argument is now deprecated, and will be
removed in SQLAlchemy 2.1. This flag has not been used for SQLAlchemy's
test suite for some time. asyncio dialects can still run in a synchronous
style by running code within a greenlet using :func:`_util.greenlet_spawn`.
.. change::
:tags: bug, typing
:tickets: 6810
Completed pep-484 typing for the ``sqlalchemy.sql.functions`` module.
:func:`_sql.select` constructs made against ``func`` elements should now
have filled-in return types.
.. changelog::
```
### 2.0.23
```
:released: November 2, 2023
.. change::
:tags: bug, oracle
:tickets: 10509
Fixed issue in :class:`.Interval` datatype where the Oracle implementation
was not being used for DDL generation, leading to the ``day_precision`` and
``second_precision`` parameters to be ignored, despite being supported by
this dialect. Pull request courtesy Indivar.
.. change::
:tags: bug, orm
:tickets: 10516
Fixed issue where the ``__allow_unmapped__`` directive failed to allow for
legacy :class:`.Column` / :func:`.deferred` mappings that nonetheless had
annotations such as ``Any`` or a specific type without ``Mapped[]`` as
their type, without errors related to locating the attribute name.
.. change::
:tags: bug, mariadb
:tickets: 10056
Adjusted the MySQL / MariaDB dialects to default a generated column to NULL
when using MariaDB, if :paramref:`_schema.Column.nullable` was not
specified with an explicit ``True`` or ``False`` value, as MariaDB does not
support the "NOT NULL" phrase with a generated column. Pull request
courtesy Indivar.
.. change::
:tags: bug, mariadb, regression
:tickets: 10505
Established a workaround for what seems to be an intrinsic issue across
MySQL/MariaDB drivers where a RETURNING result for DELETE DML which returns
no rows using SQLAlchemy's "empty IN" criteria fails to provide a
cursor.description, which then yields result that returns no rows,
leading to regressions for the ORM that in the 2.0 series uses RETURNING
for bulk DELETE statements for the "synchronize session" feature. To
resolve, when the specific case of "no description when RETURNING was
given" is detected, an "empty result" with a correct cursor description is
generated and used in place of the non-working cursor.
.. change::
:tags: bug, orm
:tickets: 10570
Fixed caching bug where using the :func:`_orm.with_expression` construct in
conjunction with loader options :func:`_orm.selectinload`,
:func:`_orm.lazyload` would fail to substitute bound parameter values
correctly on subsequent caching runs.
.. change::
:tags: usecase, mssql
:tickets: 6521
Added support for the ``aioodbc`` driver implemented for SQL Server,
which builds on top of the pyodbc and general aio* dialect architecture.
.. seealso::
:ref:`mssql_aioodbc` - in the SQL Server dialect documentation.
.. change::
:tags: bug, sql
:tickets: 10535
Added compiler-level None/NULL handling for the "literal processors" of all
datatypes that include literal processing, that is, where a value is
rendered inline within a SQL statement rather than as a bound parameter,
for all those types that do not feature explicit "null value" handling.
Previously this behavior was undefined and inconsistent.
.. change::
:tags: usecase, orm
:tickets: 10575
Implemented the :paramref:`_orm.Session.bulk_insert_mappings.render_nulls`
parameter for new style bulk ORM inserts, allowing ``render_nulls=True`` as
an execution option. This allows for bulk ORM inserts with a mixture of
``None`` values in the parameter dictionaries to use a single batch of rows
for a given set of dicationary keys, rather than breaking up into batches
that omit the NULL columns from each INSERT.
.. seealso::
:ref:`orm_queryguide_insert_null_params`
.. change::
:tags: bug, postgresql
:tickets: 10479
Fixed 2.0 regression caused by :ticket:`7744` where chains of expressions
involving PostgreSQL JSON operators combined with other operators such as
string concatenation would lose correct parenthesization, due to an
implementation detail specific to the PostgreSQL dialect.
.. change::
:tags: bug, postgresql
:tickets: 10532
Fixed SQL handling for "insertmanyvalues" when using the
:class:`.postgresql.BIT` datatype with the asyncpg backend. The
:class:`.postgresql.BIT` on asyncpg apparently requires the use of an
asyncpg-specific ``BitString`` type which is currently exposed when using
this DBAPI, making it incompatible with other PostgreSQL DBAPIs that all
work with plain bitstrings here. A future fix in version 2.1 will
normalize this datatype across all PG backends. Pull request courtesy
Sören Oldag.
.. change::
:tags: usecase, sql
:tickets: 9737
Implemented "literal value processing" for the :class:`.Interval` datatype
for both the PostgreSQL and Oracle dialects, allowing literal rendering of
interval values. Pull request courtesy Indivar Mishra.
.. change::
:tags: bug, oracle
:tickets: 10470
Fixed issue where the cx_Oracle dialect claimed to support a lower
cx_Oracle version (7.x) than was actually supported in practice within the
2.0 series of SQLAlchemy. The dialect imports symbols that are only in
cx_Oracle 8 or higher, so runtime dialect checks as well as setup.cfg
requirements have been updated to reflect this compatibility.
.. change::
:tags: sql
Removed unused placeholder method :meth:`.TypeEngine.compare_against_backend`
This method was used by very old versions of Alembic.
See https://github.com/sqlalchemy/alembic/issues/1293 for details.
.. change::
:tags: bug, orm
:tickets: 10472
Fixed bug in ORM annotated declarative where using a ``ClassVar`` that
nonetheless referred in some way to an ORM mapped class name would fail to
be interpreted as a ``ClassVar`` that's not mapped.
.. change::
:tags: bug, asyncio
:tickets: 10421
Fixed bug with method :meth:`_asyncio.AsyncSession.close_all`
that was not working correctly.
Also added function :func:`_asyncio.close_all_sessions` that's
the equivalent of :func:`_orm.close_all_sessions`.
Pull request courtesy of Bryan不可思议.
.. changelog::
```
### 2.0.22
```
:released: October 12, 2023
.. change::
:tags: bug, orm
:tickets: 10369, 10046
Fixed a wide range of :func:`_orm.mapped_column` parameters that were not
being transferred when using the :func:`_orm.mapped_column` object inside
of a pep-593 ``Annotated`` object, including
:paramref:`_orm.mapped_column.sort_order`,
:paramref:`_orm.mapped_column.deferred`,
:paramref:`_orm.mapped_column.autoincrement`,
:paramref:`_orm.mapped_column.system`, :paramref:`_orm.mapped_column.info`
etc.
Additionally, it remains not supported to have dataclass arguments, such as
:paramref:`_orm.mapped_column.kw_only`,
:paramref:`_orm.mapped_column.default_factory` etc. indicated within the
:func:`_orm.mapped_column` received by ``Annotated``, as this is not
supported with pep-681 Dataclass Transforms. A warning is now emitted when
these parameters are used within ``Annotated`` in this way (and they
continue to be ignored).
.. change::
:tags: bug, orm
:tickets: 10459
Fixed issue where calling :meth:`_engine.Result.unique` with a new-style
:func:`.select` query in the ORM, where one or more columns yields values
that are of "unknown hashability", typically when using JSON functions like
``func.json_build_object()`` without providing a type, would fail
internally when the returned values were not actually hashable. The
behavior is repaired to test the objects as they are received for
hashability in this case, raising an informative error message if not. Note
that for values of "known unhashability", such as when the
:class:`_types.JSON` or :class:`_types.ARRAY` types are used directly, an
informative error message was already raised.
The "hashabiltiy testing" fix here is applied to legacy :class:`.Query` as
well, however in the legacy case, :meth:`_engine.Result.unique` is used for
nearly all queries, so no new warning is emitted here; the legacy behavior
of falling back to using ``id()`` in this case is maintained, with the
improvement that an unknown type that turns out to be hashable will now be
uniqufied, whereas previously it would not.
.. change::
:tags: bug, orm
:tickets: 10453
Fixed regression in recently revised "insertmanyvalues" feature (likely
issue :ticket:`9618`) where the ORM would inadvertently attempt to
interpret a non-RETURNING result as one with RETURNING, in the case where
the ``implicit_returning=False`` parameter were applied to the mapped
:class:`.Table`, indicating that "insertmanyvalues" cannot be used if the
primary key values are not provided.
.. change::
:tags: bug, engine
Fixed issue within some dialects where the dialect could incorrectly return
an empty result set for an INSERT statement that does not actually return
rows at all, due to artfacts from pre- or post-fetching the primary key of
the row or rows still being present. Affected dialects included asyncpg,
all mssql dialects.
.. change::
:tags: bug, typing
:tickets: 10451
Fixed typing issue where the argument list passed to :class:`.Values` was
too-restrictively tied to ``List`` rather than ``Sequence``. Pull request
courtesy Iuri de Silvio.
.. change::
:tags: bug, orm
:tickets: 10365
Fixed bug where ORM :func:`_orm.with_loader_criteria` would not apply
itself to a :meth:`_sql.Select.join` where the ON clause were given as a
plain SQL comparison, rather than as a relationship target or similar.
.. change::
:tags: bug, sql
:tickets: 10408
Fixed issue where referring to a FROM entry in the SET clause of an UPDATE
statement would not include it in the FROM clause of the UPDATE statement,
if that entry were nowhere else in the statement; this occurs currently for
CTEs that were added using :meth:`.Update.add_cte` to provide the desired
CTE at the top of the statement.
.. change::
:tags: bug, mariadb
:tickets: 10396
Modified the mariadb-connector driver to pre-load the ``cursor.rowcount``
value for all queries, to suit tools such as Pandas that hardcode to
calling :attr:`.Result.rowcount` in this way. SQLAlchemy normally pre-loads
``cursor.rowcount`` only for UPDATE/DELETE statements and otherwise passes
through to the DBAPI where it can return -1 if no value is available.
However, mariadb-connector does not support invoking ``cursor.rowcount``
after the cursor itself is closed, raising an error instead. Generic test
support has been added to ensure all backends support the allowing
:attr:`.Result.rowcount` to succceed (that is, returning an integer
value with -1 for "not available") after the result is closed.
.. change::
:tags: bug, mariadb
Additional fixes for the mariadb-connector dialect to support UUID data
values in the result in INSERT..RETURNING statements.
.. change::
:tags: bug, mssql
:tickets: 10458
Fixed bug where the rule that prevents ORDER BY from emitting within
subqueries on SQL Server was not being disabled in the case where the
:meth:`.select.fetch` method were used to limit rows in conjunction with
WITH TIES or PERCENT, preventing valid subqueries with TOP / ORDER BY from
being used.
.. change::
:tags: bug, sql
:tickets: 10443
Fixed 2.0 regression where the :class:`.DDL` construct would no longer
``__repr__()`` due to the removed ``on`` attribute not being accommodated.
Pull request courtesy Iuri de Silvio.
.. change::
:tags: orm, usecase
:tickets: 10202
Added method :meth:`_orm.Session.get_one` that behaves like
:meth:`_orm.Session.get` but raises an exception instead of returning
``None`` if no instance was found with the provided primary key.
Pull request courtesy of Carlos Sousa.
.. change::
:tags: asyncio, bug
Fixed the :paramref:`_asyncio.AsyncSession.get.execution_options` parameter
which was not being propagated to the underlying :class:`_orm.Session` and
was instead being ignored.
.. change::
:tags: bug, orm
:tickets: 10412
Fixed issue where :class:`.Mapped` symbols like :class:`.WriteOnlyMapped`
and :class:`.DynamicMapped` could not be correctly resolved when referenced
as an element of a sub-module in the given annotation, assuming
string-based or "future annotations" style annotations.
.. change::
:tags: bug, engine
:tickets: 10414
Fixed issue where under some garbage collection / exception scenarios the
connection pool's cleanup routine would raise an error due to an unexpected
set of state, which can be reproduced under specific conditions.
.. change::
:tags: bug, typing
Updates to the codebase to support Mypy 1.6.0.
.. change::
:tags: usecase, orm
:tickets: 7787
Added an option to permanently close sessions.
Set to ``False`` the new parameter :paramref:`_orm.Session.close_resets_only`
will prevent a :class:`_orm.Session` from performing any other
operation after :meth:`_orm.Session.close` has been called.
Added new method :meth:`_orm.Session.reset` that will reset a :class:`_orm.Session`
to its initial state. This is an alias of :meth:`_orm.Session.close`,
unless :paramref:`_orm.Session.close_resets_only` is set to ``False``.
.. change::
:tags: orm, bug
:tickets: 10385
Fixed issue with ``__allow_unmapped__`` declarative option
where types that were declared using collection types such as
``list[SomeClass]`` vs. the typing construct ``List[SomeClass]``
would fail to be recognized correctly. Pull request courtesy
Pascal Corpet.
.. changelog::
```
### 2.0.21
```
:released: September 18, 2023
.. change::
:tags: bug, sql
:tickets: 9610
Adjusted the operator precedence for the string concatenation operator to
be equal to that of string matching operators, such as
:meth:`.ColumnElement.like`, :meth:`.ColumnElement.regexp_match`,
:meth:`.ColumnElement.match`, etc., as well as plain ``==`` which has the
same precedence as string comparison operators, so that parenthesis will be
applied to a string concatenation expression that follows a string match
operator. This provides for backends such as PostgreSQL where the "regexp
match" operator is apparently of higher precedence than the string
concatenation operator.
.. change::
:tags: bug, sql
:tickets: 10342
Qualified the use of ``hashlib.md5()`` within the DDL compiler, which is
used to generate deterministic four-character suffixes for long index and
constraint names in DDL statements, to include the Python 3.9+
``usedforsecurity=False`` parameter so that Python interpreters built for
restricted environments such as FIPS do not consider this call to be
related to security concerns.
.. change::
:tags: bug, postgresql
:tickets: 10226
Fixed regression which appeared in 2.0 due to :ticket:`8491` where the
revised "ping" used for PostgreSQL dialects when the
:paramref:`_sa.create_engine.pool_pre_ping` parameter is in use would
interfere with the use of asyncpg with PGBouncer "transaction" mode, as the
multiple PostgreSQL commands emitted by asnycpg could be broken out among
multiple connections leading to errors, due to the lack of any transaction
around this newly revised "ping". The ping is now invoked within a
transaction, in the same way that is implicit with all other backends that
are based on the pep-249 DBAPI; this guarantees that the series of PG
commands sent by asyncpg for this command are invoked on the same backend
connection without it jumping to a different connection mid-command. The
transaction is not used if the asyncpg dialect is used in "AUTOCOMMIT"
mode, which remains incompatible with pgbouncer transaction mode.
.. change::
:tags: bug, orm
:tickets: 10279
Adjusted the ORM's interpretation of the "target" entity used within
:class:`.Update` and :class:`.Delete` to not interfere with the target
"from" object passed to the statement, such as when passing an ORM-mapped
:class:`_orm.aliased` construct that should be maintained within a phrase
like "UPDATE FROM". Cases like ORM session synchonize using "SELECT"
statements such as with MySQL/ MariaDB will still have issues with
UPDATE/DELETE of this form so it's best to disable synchonize_session when
using DML statements of this type.
.. change::
:tags: bug, orm
:tickets: 10348
Added new capability to the :func:`_orm.selectin_polymorphic` loader option
which allows other loader options to be bundled as siblings, referring to
one of its subclasses, within the sub-options of parent loader option.
Previously, this pattern was only supported if the
:func:`_orm.selectin_polymorphic` were at the top level of the options for
the query. See new documentation section for example.
As part of this change, improved the behavior of the
:meth:`_orm.Load.selectin_polymorphic` method / loader strategy so that the
subclass load does not load most already-loaded columns from the parent
table, when the option is used against a class that is already being
relationship-loaded. Previously, the logic to load only the subclass
columns worked only for a top level class load.
.. seealso::
:ref:`polymorphic_selectin_as_loader_option_target_plus_opts`
.. change::
:tags: bug, typing
:tickets: 10264, 9284
Fixed regression introduced in 2.0.20 via :ticket:`9600` fix which
attempted to add more formal typing to
:paramref:`_schema.MetaData.naming_convention`. This change prevented basic
naming convention dictionaries from passing typing and has been adjusted so
that a plain dictionary of strings for keys as well as dictionaries that
use constraint types as keys or a mix of both, are again accepted.
As part of this change, lesser used forms of the naming convention
dictionary are also typed, including that it currently allows for
``Constraint`` type objects as keys as well.
.. change::
:tags: usecase, typing
:tickets: 10288
Made the contained type for :class:`.Mapped` covariant; this is to allow
greater flexibility for end-user typing scenarios, such as the use of
protocols to represent particular mapped class structures that are passed
to other functions. As part of this change, the contained type was also
made covariant for dependent and related types such as
:class:`_orm.base.SQLORMOperations`, :class:`_orm.WriteOnlyMapped`, and
:class:`_sql.SQLColumnExpression`. Pull request courtesy Roméo Després.
.. change::
:tags: bug, engine
:tickets: 10275
Fixed a series of reflection issues affecting the PostgreSQL,
MySQL/MariaDB, and SQLite dialects when reflecting foreign key constraints
where the target column contained parenthesis in one or both of the table
name or column name.
.. change::
:tags: bug, sql
:tickets: 10280
The :class:`.Values` construct will now automatically create a proxy (i.e.
a copy) of a :class:`_sql.column` if the column were already associated
with an existing FROM clause. This allows that an expression like
``values_obj.c.colname`` will produce the correct FROM clause even in the
case that ``colname`` was passed as a :class:`_sql.column` that was already
used with a previous :class:`.Values` or other table construct.
Originally this was considered to be a candidate for an error condition,
however it's likely this pattern is already in widespread use so it's
now added to support.
.. change::
:tags: bug, setup
:tickets: 10321
Fixed very old issue where the full extent of SQLAlchemy modules, including
``sqlalchemy.testing.fixtures``, could not be imported outside of a pytest
run. This suits inspection utilities such as ``pkgutil`` that attempt to
import all installed modules in all packages.
.. change::
:tags: usecase, sql
:tickets: 10269
Adjusted the :class:`_types.Enum` datatype to accept an argument of
``None`` for the :paramref:`_types.Enum.length` parameter, resulting in a
VARCHAR or other textual type with no length in the resulting DDL. This
allows for new elements of any length to be added to the type after it
exists in the schema. Pull request courtesy Eugene Toder.
.. change::
:tags: bug, typing
:tickets: 9878
Fixed the type annotation for ``__class_getitem__()`` as applied to the
``Visitable`` class at the base of expression constructs to accept ``Any``
for a key, rather than ``str``, which helps with some IDEs such as PyCharm
when attempting to write typing annotations for SQL constructs which
include generic selectors. Pull request courtesy Jordan Macdonald.
.. change::
:tags: bug, typing
:tickets: 10353
Repaired the core "SQL element" class ``SQLCoreOperations`` to support the
``__hash__()`` method from a typing perspective, as objects like
:class:`.Column` and ORM :class:`.InstrumentedAttribute` are hashable and
are used as dictionary keys in the public API for the :class:`_dml.Update`
and :class:`_dml.Insert` constructs. Previously, type checkers were not
aware the root SQL element was hashable.
.. change::
:tags: bug, typing
:tickets: 10337
Fixed typing issue with :meth:`_sql.Existing.select_from` that
prevented its use with ORM classes.
.. change::
:tags: usecase, sql
:tickets: 9873
Added new generic SQL function :class:`_functions.aggregate_strings`, which
accepts a SQL expression and a decimeter, concatenating strings on multiple
rows into a single aggregate value. The function is compiled on a
per-backend basis, into functions such as ``group_concat(),``
``string_agg()``, or ``LISTAGG()``.
Pull request courtesy Joshua Morris.
.. change::
:tags: typing, bug
:tickets: 10131
Update type annotations for ORM loading options, restricting them to accept
only `"*"` instead of any string for string arguments. Pull request
courtesy Janek Nouvertné.
.. changelog::
```
### 2.0.20
```
:released: August 15, 2023
.. change::
:tags: bug, orm
:tickets: 10169
Fixed issue where the ORM's generation of a SELECT from a joined
inheritance model with same-named columns in superclass and subclass would
somehow not send the correct list of column names to the :class:`.CTE`
construct, when the RECURSIVE column list were generated.
.. change::
:tags: bug, typing
:tickets: 9185
Typing improvements:
* :class:`.CursorResult` is returned for some forms of
:meth:`_orm.Session.execute` where DML without RETURNING is used
* fixed type for :paramref:`_orm.Query.with_for_update.of` parameter within
:meth:`_orm.Query.with_for_update`
* improvements to ``_DMLColumnArgument`` type used by some DML methods to
pass column expressions
* Add overload to :func:`_sql.literal` so that it is inferred that the
return type is ``BindParameter[NullType]`` where
:paramref:`_sql.literal.type_` param is None
* Add overloads to :meth:`_sql.ColumnElement.op` so that the inferred
type when :paramref:`_sql.ColumnElement.op.return_type` is not provided
is ``Callable[[Any], BinaryExpression[Any]]``
* Add missing overload to :meth:`_sql.ColumnElement.__add__`
Pull request courtesy Mehdi Gmira.
.. change::
:tags: usecase, orm
:tickets: 10192
Implemented the "RETURNING '*'" use case for ORM enabled DML statements.
This will render in as many cases as possible and return the unfiltered
result set, however is not supported for multi-parameter "ORM bulk INSERT"
statements that have specific column rendering requirements.
.. change::
:tags: bug, typing
:tickets: 10182
Fixed issue in :class:`_orm.Session` and :class:`_asyncio.AsyncSession`
methods such as :meth:`_orm.Session.connection` where the
:paramref:`_orm.Session.connection.execution_options` parameter were
hardcoded to an internal type that is not user-facing.
.. change::
:tags: orm, bug
:tickets: 10231
Fixed fairly major issue where execution options passed to
:meth:`_orm.Session.execute`, as well as execution options local to the ORM
executed statement itself, would not be propagated along to eager loaders
such as that of :func:`_orm.selectinload`, :func:`_orm.immediateload`, and
:meth:`_orm.subqueryload`, making it impossible to do things such as
disabling the cache for a single statement or using
``schema_translate_map`` for a single statement, as well as the use of
user-custom execution options. A change has been made where **all**
user-facing execution options present for :meth:`_orm.Session.execute` will
be propagated along to additional loaders.
As part of this change, the warning for "excessively deep" eager loaders
leading to caching being disabled can be silenced on a per-statement
basis by sending ``execution_options={"compiled_cache": None}`` to
:meth:`_orm.Session.execute`, which will disable caching for the full
series of statements within that scope.
.. change::
:tags: usecase, asyncio
:tickets: 9698
Added new methods :meth:`_asyncio.AsyncConnection.aclose` as a synonym for
:meth:`_asyncio.AsyncConnection.close` and
:meth:`_asyncio.AsyncSession.aclose` as a synonym for
:meth:`_asyncio.AsyncSession.close` to the
:class:`_asyncio.AsyncConnection` and :class:`_asyncio.AsyncSession`
objects, to provide compatibility with Python standard library
``contextlib.aclosin
pyup-bot
commented
7 months ago
Update Flask from 1.1.2 to 3.0.2.
Changelog
### 3.0.2 ``` This is a fix release for the 3.0.x feature release branch. It fixes bugs but does not otherwise change behavior and should not result in breaking changes. * Changes: https://flask.palletsprojects.com/en/3.0.x/changes/#version-3.0.2 * Milestone: https://github.com/pallets/flask/milestone/34?closed=1 * PyPI: https://pypi.org/project/Flask/3.0.2/ ``` ### 3.0.1 ``` This is a fix release for the 3.0.x feature release branch. Fixes an issue where using other JSON providers, such as `flask-orjson`, previously caused loaded session data to have an incorrect format in some cases. * Changes: https://flask.palletsprojects.com/en/3.0.x/changes/#version-3-0-1 * Milestone: https://github.com/pallets/flask/milestone/32?closed=1 * PyPI: https://pypi.org/project/Flask/3.0.1/ ``` ### 3.0.0 ``` This is a feature release, which includes new features, removes previously deprecated code, and adds new deprecations. The 3.0.x branch is now the supported fix branch, the 2.3.x branch will become a tag marking the end of support for that branch. We encourage everyone to upgrade, and to use a tool such as [pip-tools](https://pypi.org/project/pip-tools/) to pin all dependencies and control upgrades. Test with warnings treated as errors to be able to adapt to deprecation warnings early. * Changes: https://flask.palletsprojects.com/en/3.0.x/changes/#version-3-0-0 * Milestone: https://github.com/pallets/flask/milestone/20?closed=1 ``` ### 2.3.3 ``` This is a fix release for the 2.3.x feature branch. - Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-3 - Milestone: https://github.com/pallets/flask/milestone/31?closed=1 ``` ### 2.3.2 ``` This is a security fix release for the 2.3.x release branch. * Security advisory: https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq, CVE-2023-30861 * Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-2 * Milestone: https://github.com/pallets/flask/milestone/29?closed=1 ``` ### 2.3.1 ``` This is a fix release for the 2.3.x release branch. * Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-1 * Milestone: https://github.com/pallets/flask/milestone/28?closed=1 ``` ### 2.3.0 ``` This is a feature release, which includes new features, removes previously deprecated code, and adds new deprecations. The 2.3.x branch is now the supported fix branch, the 2.2.x branch will become a tag marking the end of support for that branch. We encourage everyone to upgrade, and to use a tool such as [pip-tools](https://pypi.org/project/pip-tools/) to pin all dependencies and control upgrades. Test with warnings treated as errors to be able to adapt to deprecation warnings early. * Changes: https://flask.palletsprojects.com/en/2.3.x/changes/#version-2-3-0 * Milestone: https://github.com/pallets/flask/milestone/24?closed=1 ``` ### 2.2.5 ``` This is a security fix release for the 2.2.x release branch. Note that 2.3.x is the currently supported release branch; please upgrade to the latest version if possible. * Security advisory: https://github.com/pallets/flask/security/advisories/GHSA-m2qf-hxjv-5gpq, CVE-2023-30861 * Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-5 * Milestone: https://github.com/pallets/flask/milestone/30?closed=1 ``` ### 2.2.4 ``` This is a fix release for the 2.2.x release branch. * Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-4 * Milestone: https://github.com/pallets/flask/milestone/27?closed=1 ``` ### 2.2.3 ``` This is a fix release for the 2.2.x release branch. * Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-3 * Milestone: https://github.com/pallets/flask/milestone/26?closed=1 ``` ### 2.2.2 ``` This is a fix release for the [2.2.0](https://github.com/pallets/flask/releases/tag/2.2.0) feature release. * Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-2 * Milestone: https://github.com/pallets/flask/milestone/25?closed=1 ``` ### 2.2.1 ``` This is a fix release for the [2.2.0](https://github.com/pallets/flask/releases/tag/2.2.0) feature release. * Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-1 * Milestone: https://github.com/pallets/flask/milestone/23?closed=1 ``` ### 2.2.0 ``` This is a feature release, which includes new features and removes previously deprecated code. The 2.2.x branch is now the supported bug fix branch, the 2.1.x branch will become a tag marking the end of support for that branch. We encourage everyone to upgrade, and to use a tool such as [pip-tools](https://pypi.org/project/pip-tools/) to pin all dependencies and control upgrades. * Changes: https://flask.palletsprojects.com/en/2.2.x/changes/#version-2-2-0 * Milestone: https://github.com/pallets/flask/milestone/19?closed=1 ``` ### 2.1.3 ``` * Changes: https://flask.palletsprojects.com/en/2.1.x/changes/#version-2-1-3 * Milestone: https://github.com/pallets/flask/milestone/22?closed=1 ``` ### 2.1.2 ``` This is a fix release for the [2.1.0](https://github.com/pallets/flask/releases/tag/2.1.0) feature release. * Changes: https://flask.palletsprojects.com/en/2.1.x/changes/#version-2-1-2 * Milestone: https://github.com/pallets/flask/milestone/21?closed=1 ``` ### 2.1.1 ``` This is a fix release for the [2.1.0](https://github.com/pallets/flask/releases/tag/2.1.0) feature release. * Changes: https://flask.palletsprojects.com/en/2.1.x/changes/#version-2-1-1 * Milestone: https://github.com/pallets/flask/milestone/18?closed=1 ``` ### 2.1.0 ``` This is a feature release, which includes new features and removes previously deprecated features. The 2.1.x branch is now the supported bugfix branch, the 2.0.x branch will become a tag marking the end of support for that branch. We encourage everyone to upgrade, and to use a tool such as [pip-tools](https://pypi.org/project/pip-tools/) to pin all dependencies and control upgrades. * Changes: https://flask.palletsprojects.com/en/2.1.x/changes/#version-2-1-0 * Milestone: https://github.com/pallets/flask/milestone/13?closed=1 We also encourage upgrading to the latest versions of the other Pallets projects as well. * Werkzeug 2.1 changes: https://werkzeug.palletsprojects.com/en/2.1.x/changes/#version-2-1-0 * Jinja 3.1 changes: https://jinja.palletsprojects.com/en/3.1.x/changes/#version-3-1-1 * Click 8.1 changes: https://click.palletsprojects.com/en/8.1.x/changes/#version-8-1-0 * MarkupSafe 2.1 changes: https://markupsafe.palletsprojects.com/en/2.1.x/changes/#version-2-1-1 * ItsDangerous 2.1 changes: https://itsdangerous.palletsprojects.com/en/2.1.x/changes/#version-2-1-2 ``` ### 2.0.3 ``` * Changes: https://flask.palletsprojects.com/en/2.0.x/changes/#version-2-0-3 * Milestone: https://github.com/pallets/flask/milestone/17?closed=1 ``` ### 2.0.2 ``` * Changes: https://flask.palletsprojects.com/en/2.0.x/changes/#version-2-0-2 ``` ### 2.0.1 ``` * Changes: https://flask.palletsprojects.com/en/2.0.x/changes/#version-2-0-1 ``` ### 2.0.0 ``` New major versions of all the core Pallets libraries, including Flask 2.0, have been released! :tada: * Read the announcement on our blog: https://palletsprojects.com/blog/flask-2-0-released/ * Read the full list of changes: https://flask.palletsprojects.com/changes/#version-2-0-0 * Retweet the announcement on Twitter: https://twitter.com/PalletsTeam/status/1392266507296514048 * Follow our blog, Twitter, or GitHub to see future announcements. This represents a significant amount of work, and there are quite a few changes. Be sure to carefully read the changelog, and use tools such as pip-compile and Dependabot to pin your dependencies and control your updates. ``` ### 2.0.0rc2 ``` * Changes: https://flask.palletsprojects.com/en/master/changes#version-2-0-0 ``` ### 2.0.0rc1 ``` * Changes: https://flask.palletsprojects.com/en/master/changes/#version-2-0-0 ```Links
- PyPI: https://pypi.org/project/flask - Changelog: https://data.safetycli.com/changelogs/flask/Update Flask-Admin from 1.5.7 to 1.6.1.
Changelog
### 1.6.1 ``` ----- * SQLAlchemy 2.x support * General updates and bug fixes * Dropped WTForms 1 support ``` ### 1.6.0 ``` ----- * Dropped Python 2 support * WTForms 3.0 support * Various fixes ``` ### 1.5.8 ``` ----- * SQLAlchemy 1.4.5+ compatibility fixes * Redis CLI fixes ```Links
- PyPI: https://pypi.org/project/flask-admin - Changelog: https://data.safetycli.com/changelogs/flask-admin/ - Repo: https://github.com/flask-admin/flask-admin/ - Docs: https://pythonhosted.org/Flask-Admin/Update Flask-SQLAlchemy from 2.4.4 to 3.1.1.
Changelog
### 3.1.1 ``` ------------- Released 2023-09-11 - Deprecate the ``__version__`` attribute. Use feature detection, or ``importlib.metadata.version("flask-sqlalchemy")``, instead. :issue:`5230` ``` ### 3.1.0 ``` ------------- Released 2023-09-11 - Drop support for Python 3.7. :pr:`1251` - Add support for the SQLAlchemy 2.x API via ``model_class`` parameter. :issue:`1140` - Bump minimum version of SQLAlchemy to 2.0.16. - Remove previously deprecated code. - Pass extra keyword arguments from ``get_or_404`` to ``session.get``. :issue:`1149` - Fix bug with finding right bind key for clause statements. :issue:`1211` ``` ### 3.0.5 ``` ------------- Released 2023-06-21 - ``Pagination.next()`` enforces ``max_per_page``. :issue:`1201` - Improve type hint for ``get_or_404`` return value to be non-optional. :pr:`1226` ``` ### 3.0.4 ``` ------------- Released 2023-06-19 - Fix type hint for ``get_or_404`` return value. :pr:`1208` - Fix type hints for pyright (used by VS Code Pylance extension). :issue:`1205` ``` ### 3.0.3 ``` ------------- Released 2023-01-31 - Show helpful errors when mistakenly using multiple ``SQLAlchemy`` instances for the same app, or without calling ``init_app``. :pr:`1151` - Fix issue with getting the engine associated with a model that uses polymorphic table inheritance. :issue:`1155` ``` ### 3.0.2 ``` ------------- Released 2022-10-14 - Update compatibility with SQLAlchemy 2. :issue:`1122` ``` ### 3.0.1 ``` ------------- Released 2022-10-11 - Export typing information instead of using external typeshed definitions. :issue:`1112` - If default engine options are set, but ``SQLALCHEMY_DATABASE_URI`` is not set, an invalid default bind will not be configured. :issue:`1117` ``` ### 3.0.0 ``` ------------- Released 2022-10-04 - Drop support for Python 2, 3.4, 3.5, and 3.6. - Bump minimum version of Flask to 2.2. - Bump minimum version of SQLAlchemy to 1.4.18. - Remove previously deprecated code. - The session is scoped to the current app context instead of the thread. This requires that an app context is active. This ensures that the session is cleaned up after every request. - An active Flask application context is always required to access ``session`` and ``engine``, regardless of if an application was passed to the constructor. :issue:`508, 944` - Different bind keys use different SQLAlchemy ``MetaData`` registries, allowing tables in different databases to have the same name. Bind keys are stored and looked up on the resulting metadata rather than the model or table. - ``SQLALCHEMY_DATABASE_URI`` does not default to ``sqlite:///:memory:``. An error is raised if neither it nor ``SQLALCHEMY_BINDS`` define any engines. :pr:`731` - Configuring SQLite with a relative path is relative to ``app.instance_path`` instead of ``app.root_path``. The instance folder is created if necessary. :issue:`462` - Added ``get_or_404``, ``first_or_404``, ``one_or_404``, and ``paginate`` methods to the extension object. These use SQLAlchemy's preferred ``session.execute(select())`` pattern instead of the legacy query interface. :issue:`1088` - Setup methods that create the engines and session are renamed with a leading underscore. They are considered internal interfaces which may change at any time. - All parameters to ``SQLAlchemy`` except ``app`` are keyword-only. - Renamed the ``bind`` parameter to ``bind_key`` and removed the ``app`` parameter from various ``SQLAlchemy`` methods. - The extension object uses ``__getattr__`` to alias names from the SQLAlchemy package, rather than copying them as attributes. - The extension object is stored directly as ``app.extensions["sqlalchemy"]``. :issue:`698` - The session class can be customized by passing the ``class_`` key in the ``session_options`` parameter. :issue:`327` - ``SignallingSession`` is renamed to ``Session``. - ``Session.get_bind`` more closely matches the base implementation. - Model classes and the ``db`` instance are available without imports in ``flask shell``. :issue:`1089` - The ``CamelCase`` to ``snake_case`` table name converter handles more patterns correctly. If model that was already created in the database changed, either use Alembic to rename the table, or set ``__tablename__`` to keep the old name. :issue:`406` - ``Model`` ``repr`` distinguishes between transient and pending instances. :issue:`967` - A custom model class can implement ``__init_subclass__`` with class parameters. :issue:`1002` - ``db.Table`` is a subclass instead of a function. - The ``engine_options`` parameter is applied as defaults before per-engine configuration. - ``SQLALCHEMY_BINDS`` values can either be an engine URL, or a dict of engine options including URL, for each bind. ``SQLALCHEMY_DATABASE_URI`` and ``SQLALCHEMY_ENGINE_OPTIONS`` correspond to the ``None`` key and take precedence. :issue:`783` - Engines are created when calling ``init_app`` rather than the first time they are accessed. :issue:`698` - ``db.engines`` exposes the map of bind keys to engines for the current app. - ``get_engine``, ``get_tables_for_bind``, and ``get_binds`` are deprecated. - SQLite driver-level URIs that look like ``sqlite:///file:name.db?uri=true`` are supported. :issue:`998, 1045` - SQLite engines do not use ``NullPool`` if ``pool_size`` is 0. - MySQL engines use the "utf8mb4" charset by default. :issue:`875` - MySQL engines do not set ``pool_size`` to 10. - MySQL engines don't set a default for ``pool_recycle`` if not using a queue pool. :issue:`803` - ``Query`` is renamed from ``BaseQuery``. - Added ``Query.one_or_404``. - The query class is applied to ``backref`` in ``relationship``. :issue:`417` - Creating ``Pagination`` objects manually is no longer a public API. They should be created with ``db.paginate`` or ``query.paginate``. :issue:`1088` - ``Pagination.iter_pages`` and ``Query.paginate`` parameters are keyword-only. - ``Pagination`` is iterable, iterating over its items. :issue:`70` - Pagination count query is more efficient. - ``Pagination.iter_pages`` is more efficient. :issue:`622` - ``Pagination.iter_pages`` ``right_current`` parameter is inclusive. - Pagination ``per_page`` cannot be 0. :issue:`1091` - Pagination ``max_per_page`` defaults to 100. :issue:`1091` - Added ``Pagination.first`` and ``last`` properties, which give the number of the first and last item on the page. :issue:`567` - ``SQLALCHEMY_RECORD_QUERIES`` is disabled by default, and is not enabled automatically with ``app.debug`` or ``app.testing``. :issue:`1092` - ``get_debug_queries`` is renamed to ``get_recorded_queries`` to better match the config and functionality. - Recorded query info is a dataclass instead of a tuple. The ``context`` attribute is renamed to ``location``. Finding the location uses a more inclusive check. - ``SQLALCHEMY_TRACK_MODIFICATIONS`` is disabled by default. :pr:`727` - ``SQLALCHEMY_COMMIT_ON_TEARDOWN`` is deprecated. It can cause various design issues that are difficult to debug. Call ``db.session.commit()`` directly instead. :issue:`216` ``` ### 2.5.1 ``` ------------- Released 2021-03-18 - Fix compatibility with Python 2.7. ``` ### 2.5.0 ``` ------------- Released 2021-03-18 - Update to support SQLAlchemy 1.4. - SQLAlchemy ``URL`` objects are immutable. Some internal methods have changed to return a new URL instead of ``None``. :issue:`885` ```Links
- PyPI: https://pypi.org/project/flask-sqlalchemy - Changelog: https://data.safetycli.com/changelogs/flask-sqlalchemy/ - Docs: https://pythonhosted.org/Flask-SQLAlchemy/Update SQLAlchemy from 1.3.20 to 2.0.28.
Changelog
### 2.0.28 ``` :released: March 4, 2024 .. change:: :tags: engine, usecase :tickets: 10974 Added new core execution option :paramref:`_engine.Connection.execution_options.preserve_rowcount`. When set, the ``cursor.rowcount`` attribute from the DBAPI cursor will be unconditionally memoized at statement execution time, so that whatever value the DBAPI offers for any kind of statement will be available using the :attr:`_engine.CursorResult.rowcount` attribute from the :class:`_engine.CursorResult`. This allows the rowcount to be accessed for statments such as INSERT and SELECT, to the degree supported by the DBAPI in use. The :ref:`engine_insertmanyvalues` also supports this option and will ensure :attr:`_engine.CursorResult.rowcount` is correctly set for a bulk INSERT of rows when set. .. change:: :tags: bug, orm, regression :tickets: 11010 Fixed regression caused by :ticket:`9779` where using the "secondary" table in a relationship ``and_()`` expression would fail to be aliased to match how the "secondary" table normally renders within a :meth:`_sql.Select.join` expression, leading to an invalid query. .. change:: :tags: bug, orm, performance, regression :tickets: 11085 Adjusted the fix made in :ticket:`10570`, released in 2.0.23, where new logic was added to reconcile possibly changing bound parameter values across cache key generations used within the :func:`_orm.with_expression` construct. The new logic changes the approach by which the new bound parameter values are associated with the statement, avoiding the need to deep-copy the statement which can result in a significant performance penalty for very deep / complex SQL constructs. The new approach no longer requires this deep-copy step. .. change:: :tags: bug, asyncio :tickets: 8771 An error is raised if a :class:`.QueuePool` or other non-asyncio pool class is passed to :func:`_asyncio.create_async_engine`. This engine only accepts asyncio-compatible pool classes including :class:`.AsyncAdaptedQueuePool`. Other pool classes such as :class:`.NullPool` are compatible with both synchronous and asynchronous engines as they do not perform any locking. .. seealso:: :ref:`pool_api` .. change:: :tags: change, tests pytest support in the tox.ini file has been updated to support pytest 8.1. .. changelog:: ``` ### 2.0.27 ``` :released: February 13, 2024 .. change:: :tags: bug, postgresql, regression :tickets: 11005 Fixed regression caused by just-released fix for :ticket:`10863` where an invalid exception class were added to the "except" block, which does not get exercised unless such a catch actually happens. A mock-style test has been added to ensure this catch is exercised in unit tests. .. changelog:: ``` ### 2.0.26 ``` :released: February 11, 2024 .. change:: :tags: usecase, postgresql, reflection :tickets: 10777 Added support for reflection of PostgreSQL CHECK constraints marked with "NO INHERIT", setting the key ``no_inherit=True`` in the reflected data. Pull request courtesy Ellis Valentiner. .. change:: :tags: bug, sql :tickets: 10843 Fixed issues in :func:`_sql.case` where the logic for determining the type of the expression could result in :class:`.NullType` if the last element in the "whens" had no type, or in other cases where the type could resolve to ``None``. The logic has been updated to scan all given expressions so that the first non-null type is used, as well as to always ensure a type is present. Pull request courtesy David Evans. .. change:: :tags: bug, mysql :tickets: 10850 Fixed issue where NULL/NOT NULL would not be properly reflected from a MySQL column that also specified the VIRTUAL or STORED directives. Pull request courtesy Georg Wicke-Arndt. .. change:: :tags: bug, regression, postgresql :tickets: 10863 Fixed regression in the asyncpg dialect caused by :ticket:`10717` in release 2.0.24 where the change that now attempts to gracefully close the asyncpg connection before terminating would not fall back to ``terminate()`` for other potential connection-related exceptions other than a timeout error, not taking into account cases where the graceful ``.close()`` attempt fails for other reasons such as connection errors. .. change:: :tags: oracle, bug, performance :tickets: 10877 Changed the default arraysize of the Oracle dialects so that the value set by the driver is used, that is 100 at the time of writing for both cx_oracle and oracledb. Previously the value was set to 50 by default. The setting of 50 could cause significant performance regressions compared to when using cx_oracle/oracledb alone to fetch many hundreds of rows over slower networks. .. change:: :tags: bug, mysql :tickets: 10893 Fixed issue in asyncio dialects asyncmy and aiomysql, where their ``.close()`` method is apparently not a graceful close. replace with non-standard ``.ensure_closed()`` method that's awaitable and move ``.close()`` to the so-called "terminate" case. .. change:: :tags: bug, orm :tickets: 10896 Replaced the "loader depth is excessively deep" warning with a shorter message added to the caching badge within SQL logging, for those statements where the ORM disabled the cache due to a too-deep chain of loader options. The condition which this warning highlights is difficult to resolve and is generally just a limitation in the ORM's application of SQL caching. A future feature may include the ability to tune the threshold where caching is disabled, but for now the warning will no longer be a nuisance. .. change:: :tags: bug, orm :tickets: 10899 Fixed issue where it was not possible to use a type (such as an enum) within a :class:`_orm.Mapped` container type if that type were declared locally within the class body. The scope of locals used for the eval now includes that of the class body itself. In addition, the expression within :class:`_orm.Mapped` may also refer to the class name itself, if used as a string or with future annotations mode. .. change:: :tags: usecase, postgresql :tickets: 10904 Support the ``USING <method>`` option for PostgreSQL ``CREATE TABLE`` to specify the access method to use to store the contents for the new table. Pull request courtesy Edgar Ramírez-Mondragón. .. seealso:: :ref:`postgresql_table_options` .. change:: :tags: bug, examples :tickets: 10920 Fixed regression in history_meta example where the use of :meth:`_schema.MetaData.to_metadata` to make a copy of the history table would also copy indexes (which is a good thing), but causing naming conflicts indexes regardless of naming scheme used for those indexes. A "_history" suffix is now added to these indexes in the same way as is achieved for the table name. .. change:: :tags: bug, orm :tickets: 10967 Fixed issue where using :meth:`_orm.Session.delete` along with the :paramref:`_orm.Mapper.version_id_col` feature would fail to use the correct version identifier in the case that an additional UPDATE were emitted against the target object as a result of the use of :paramref:`_orm.relationship.post_update` on the object. The issue is similar to :ticket:`10800` just fixed in version 2.0.25 for the case of updates alone. .. change:: :tags: bug, orm :tickets: 10990 Fixed issue where an assertion within the implementation for :func:`_orm.with_expression` would raise if a SQL expression that was not cacheable were used; this was a 2.0 regression since 1.4. .. change:: :tags: postgresql, usecase :tickets: 9736 Correctly type PostgreSQL RANGE and MULTIRANGE types as ``Range[T]`` and ``Sequence[Range[T]]``. Introduced utility sequence :class:`_postgresql.MultiRange` to allow better interoperability of MULTIRANGE types. .. change:: :tags: postgresql, usecase Differentiate between INT4 and INT8 ranges and multi-ranges types when inferring the database type from a :class:`_postgresql.Range` or :class:`_postgresql.MultiRange` instance, preferring INT4 if the values fit into it. .. change:: :tags: bug, typing Fixed the type signature for the :meth:`.PoolEvents.checkin` event to indicate that the given :class:`.DBAPIConnection` argument may be ``None`` in the case where the connection has been invalidated. .. change:: :tags: bug, examples Fixed the performance example scripts in examples/performance to mostly work with the Oracle database, by adding the :class:`.Identity` construct to all the tables and allowing primary generation to occur on this backend. A few of the "raw DBAPI" cases still are not compatible with Oracle. .. change:: :tags: bug, mssql Fixed an issue regarding the use of the :class:`.Uuid` datatype with the :paramref:`.Uuid.as_uuid` parameter set to False, when using the pymssql dialect. ORM-optimized INSERT statements (e.g. the "insertmanyvalues" feature) would not correctly align primary key UUID values for bulk INSERT statements, resulting in errors. Similar issues were fixed for the PostgreSQL drivers as well. .. change:: :tags: bug, postgresql Fixed an issue regarding the use of the :class:`.Uuid` datatype with the :paramref:`.Uuid.as_uuid` parameter set to False, when using PostgreSQL dialects. ORM-optimized INSERT statements (e.g. the "insertmanyvalues" feature) would not correctly align primary key UUID values for bulk INSERT statements, resulting in errors. Similar issues were fixed for the pymssql driver as well. .. changelog:: ``` ### 2.0.25 ``` :released: January 2, 2024 .. change:: :tags: oracle, asyncio :tickets: 10679 Added support for :ref:`oracledb` in asyncio mode, using the newly released version of the ``oracledb`` DBAPI that includes asyncio support. For the 2.0 series, this is a preview release, where the current implementation does not yet have include support for :meth:`_asyncio.AsyncConnection.stream`. Improved support is planned for the 2.1 release of SQLAlchemy. .. change:: :tags: bug, orm :tickets: 10800 Fixed issue where when making use of the :paramref:`_orm.relationship.post_update` feature at the same time as using a mapper version_id_col could lead to a situation where the second UPDATE statement emitted by the post-update feature would fail to make use of the correct version identifier, assuming an UPDATE was already emitted in that flush which had already bumped the version counter. .. change:: :tags: bug, typing :tickets: 10801, 10818 Fixed regressions caused by typing added to the ``sqlalchemy.sql.functions`` module in version 2.0.24, as part of :ticket:`6810`: * Further enhancements to pep-484 typing to allow SQL functions from :attr:`_sql.func` derived elements to work more effectively with ORM-mapped attributes (:ticket:`10801`) * Fixed the argument types passed to functions so that literal expressions like strings and ints are again interpreted correctly (:ticket:`10818`) .. change:: :tags: usecase, orm :tickets: 10807 Added preliminary support for Python 3.12 pep-695 type alias structures, when resolving custom type maps for ORM Annotated Declarative mappings. .. change:: :tags: bug, orm :tickets: 10815 Fixed issue where ORM Annotated Declarative would mis-interpret the left hand side of a relationship without any collection specified as uselist=True if the left type were given as a class and not a string, without using future-style annotations. .. change:: :tags: bug, sql :tickets: 10817 Improved compilation of :func:`_sql.any_` / :func:`_sql.all_` in the context of a negation of boolean comparison, will now render ``NOT (expr)`` rather than reversing the equality operator to not equals, allowing finer-grained control of negations for these non-typical operators. .. changelog:: ``` ### 2.0.24 ``` :released: December 28, 2023 .. change:: :tags: bug, orm :tickets: 10597 Fixed issue where use of :func:`_orm.foreign` annotation on a non-initialized :func:`_orm.mapped_column` construct would produce an expression without a type, which was then not updated at initialization time of the actual column, leading to issues such as relationships not determining ``use_get`` appropriately. .. change:: :tags: bug, schema :tickets: 10654 Fixed issue where error reporting for unexpected schema item when creating objects like :class:`_schema.Table` would incorrectly handle an argument that was itself passed as a tuple, leading to a formatting error. The error message has been modernized to use f-strings. .. change:: :tags: bug, engine :tickets: 10662 Fixed URL-encoding of the username and password components of :class:`.engine.URL` objects when converting them to string using the :meth:`_engine.URL.render_as_string` method, by using Python standard library ``urllib.parse.quote`` while allowing for plus signs and spaces to remain unchanged as supported by SQLAlchemy's non-standard URL parsing, rather than the legacy home-grown routine from many years ago. Pull request courtesy of Xavier NUNN. .. change:: :tags: bug, orm :tickets: 10668 Improved the error message produced when the unit of work process sets the value of a primary key column to NULL due to a related object with a dependency rule on that column being deleted, to include not just the destination object and column name but also the source column from which the NULL value is originating. Pull request courtesy Jan Vollmer. .. change:: :tags: bug, postgresql :tickets: 10717 Adjusted the asyncpg dialect such that when the ``terminate()`` method is used to discard an invalidated connection, the dialect will first attempt to gracefully close the connection using ``.close()`` with a timeout, if the operation is proceeding within an async event loop context only. This allows the asyncpg driver to attend to finalizing a ``TimeoutError`` including being able to close a long-running query server side, which otherwise can keep running after the program has exited. .. change:: :tags: bug, orm :tickets: 10732 Modified the ``__init_subclass__()`` method used by :class:`_orm.MappedAsDataclass`, :class:`_orm.DeclarativeBase` and :class:`_orm.DeclarativeBaseNoMeta` to accept arbitrary ``**kw`` and to propagate them to the ``super()`` call, allowing greater flexibility in arranging custom superclasses and mixins which make use of ``__init_subclass__()`` keyword arguments. Pull request courtesy Michael Oliver. .. change:: :tags: bug, tests :tickets: 10747 Improvements to the test suite to further harden its ability to run when Python ``greenlet`` is not installed. There is now a tox target that includes the token "nogreenlet" that will run the suite with greenlet not installed (note that it still temporarily installs greenlet as part of the tox config, however). .. change:: :tags: bug, sql :tickets: 10753 Fixed issue in stringify for SQL elements, where a specific dialect is not passed, where a dialect-specific element such as the PostgreSQL "on conflict do update" construct is encountered and then fails to provide for a stringify dialect with the appropriate state to render the construct, leading to internal errors. .. change:: :tags: bug, sql Fixed issue where stringifying or compiling a :class:`.CTE` that was against a DML construct such as an :func:`_sql.insert` construct would fail to stringify, due to a mis-detection that the statement overall is an INSERT, leading to internal errors. .. change:: :tags: bug, orm :tickets: 10776 Ensured the use case of :class:`.Bundle` objects used in the ``returning()`` portion of ORM-enabled INSERT, UPDATE and DELETE statements is tested and works fully. This was never explicitly implemented or tested previously and did not work correctly in the 1.4 series; in the 2.0 series, ORM UPDATE/DELETE with WHERE criteria was missing an implementation method preventing :class:`.Bundle` objects from working. .. change:: :tags: bug, orm :tickets: 10784 Fixed 2.0 regression in :class:`.MutableList` where a routine that detects sequences would not correctly filter out string or bytes instances, making it impossible to assign a string value to a specific index (while non-sequence values would work fine). .. change:: :tags: change, asyncio The ``async_fallback`` dialect argument is now deprecated, and will be removed in SQLAlchemy 2.1. This flag has not been used for SQLAlchemy's test suite for some time. asyncio dialects can still run in a synchronous style by running code within a greenlet using :func:`_util.greenlet_spawn`. .. change:: :tags: bug, typing :tickets: 6810 Completed pep-484 typing for the ``sqlalchemy.sql.functions`` module. :func:`_sql.select` constructs made against ``func`` elements should now have filled-in return types. .. changelog:: ``` ### 2.0.23 ``` :released: November 2, 2023 .. change:: :tags: bug, oracle :tickets: 10509 Fixed issue in :class:`.Interval` datatype where the Oracle implementation was not being used for DDL generation, leading to the ``day_precision`` and ``second_precision`` parameters to be ignored, despite being supported by this dialect. Pull request courtesy Indivar. .. change:: :tags: bug, orm :tickets: 10516 Fixed issue where the ``__allow_unmapped__`` directive failed to allow for legacy :class:`.Column` / :func:`.deferred` mappings that nonetheless had annotations such as ``Any`` or a specific type without ``Mapped[]`` as their type, without errors related to locating the attribute name. .. change:: :tags: bug, mariadb :tickets: 10056 Adjusted the MySQL / MariaDB dialects to default a generated column to NULL when using MariaDB, if :paramref:`_schema.Column.nullable` was not specified with an explicit ``True`` or ``False`` value, as MariaDB does not support the "NOT NULL" phrase with a generated column. Pull request courtesy Indivar. .. change:: :tags: bug, mariadb, regression :tickets: 10505 Established a workaround for what seems to be an intrinsic issue across MySQL/MariaDB drivers where a RETURNING result for DELETE DML which returns no rows using SQLAlchemy's "empty IN" criteria fails to provide a cursor.description, which then yields result that returns no rows, leading to regressions for the ORM that in the 2.0 series uses RETURNING for bulk DELETE statements for the "synchronize session" feature. To resolve, when the specific case of "no description when RETURNING was given" is detected, an "empty result" with a correct cursor description is generated and used in place of the non-working cursor. .. change:: :tags: bug, orm :tickets: 10570 Fixed caching bug where using the :func:`_orm.with_expression` construct in conjunction with loader options :func:`_orm.selectinload`, :func:`_orm.lazyload` would fail to substitute bound parameter values correctly on subsequent caching runs. .. change:: :tags: usecase, mssql :tickets: 6521 Added support for the ``aioodbc`` driver implemented for SQL Server, which builds on top of the pyodbc and general aio* dialect architecture. .. seealso:: :ref:`mssql_aioodbc` - in the SQL Server dialect documentation. .. change:: :tags: bug, sql :tickets: 10535 Added compiler-level None/NULL handling for the "literal processors" of all datatypes that include literal processing, that is, where a value is rendered inline within a SQL statement rather than as a bound parameter, for all those types that do not feature explicit "null value" handling. Previously this behavior was undefined and inconsistent. .. change:: :tags: usecase, orm :tickets: 10575 Implemented the :paramref:`_orm.Session.bulk_insert_mappings.render_nulls` parameter for new style bulk ORM inserts, allowing ``render_nulls=True`` as an execution option. This allows for bulk ORM inserts with a mixture of ``None`` values in the parameter dictionaries to use a single batch of rows for a given set of dicationary keys, rather than breaking up into batches that omit the NULL columns from each INSERT. .. seealso:: :ref:`orm_queryguide_insert_null_params` .. change:: :tags: bug, postgresql :tickets: 10479 Fixed 2.0 regression caused by :ticket:`7744` where chains of expressions involving PostgreSQL JSON operators combined with other operators such as string concatenation would lose correct parenthesization, due to an implementation detail specific to the PostgreSQL dialect. .. change:: :tags: bug, postgresql :tickets: 10532 Fixed SQL handling for "insertmanyvalues" when using the :class:`.postgresql.BIT` datatype with the asyncpg backend. The :class:`.postgresql.BIT` on asyncpg apparently requires the use of an asyncpg-specific ``BitString`` type which is currently exposed when using this DBAPI, making it incompatible with other PostgreSQL DBAPIs that all work with plain bitstrings here. A future fix in version 2.1 will normalize this datatype across all PG backends. Pull request courtesy Sören Oldag. .. change:: :tags: usecase, sql :tickets: 9737 Implemented "literal value processing" for the :class:`.Interval` datatype for both the PostgreSQL and Oracle dialects, allowing literal rendering of interval values. Pull request courtesy Indivar Mishra. .. change:: :tags: bug, oracle :tickets: 10470 Fixed issue where the cx_Oracle dialect claimed to support a lower cx_Oracle version (7.x) than was actually supported in practice within the 2.0 series of SQLAlchemy. The dialect imports symbols that are only in cx_Oracle 8 or higher, so runtime dialect checks as well as setup.cfg requirements have been updated to reflect this compatibility. .. change:: :tags: sql Removed unused placeholder method :meth:`.TypeEngine.compare_against_backend` This method was used by very old versions of Alembic. See https://github.com/sqlalchemy/alembic/issues/1293 for details. .. change:: :tags: bug, orm :tickets: 10472 Fixed bug in ORM annotated declarative where using a ``ClassVar`` that nonetheless referred in some way to an ORM mapped class name would fail to be interpreted as a ``ClassVar`` that's not mapped. .. change:: :tags: bug, asyncio :tickets: 10421 Fixed bug with method :meth:`_asyncio.AsyncSession.close_all` that was not working correctly. Also added function :func:`_asyncio.close_all_sessions` that's the equivalent of :func:`_orm.close_all_sessions`. Pull request courtesy of Bryan不可思议. .. changelog:: ``` ### 2.0.22 ``` :released: October 12, 2023 .. change:: :tags: bug, orm :tickets: 10369, 10046 Fixed a wide range of :func:`_orm.mapped_column` parameters that were not being transferred when using the :func:`_orm.mapped_column` object inside of a pep-593 ``Annotated`` object, including :paramref:`_orm.mapped_column.sort_order`, :paramref:`_orm.mapped_column.deferred`, :paramref:`_orm.mapped_column.autoincrement`, :paramref:`_orm.mapped_column.system`, :paramref:`_orm.mapped_column.info` etc. Additionally, it remains not supported to have dataclass arguments, such as :paramref:`_orm.mapped_column.kw_only`, :paramref:`_orm.mapped_column.default_factory` etc. indicated within the :func:`_orm.mapped_column` received by ``Annotated``, as this is not supported with pep-681 Dataclass Transforms. A warning is now emitted when these parameters are used within ``Annotated`` in this way (and they continue to be ignored). .. change:: :tags: bug, orm :tickets: 10459 Fixed issue where calling :meth:`_engine.Result.unique` with a new-style :func:`.select` query in the ORM, where one or more columns yields values that are of "unknown hashability", typically when using JSON functions like ``func.json_build_object()`` without providing a type, would fail internally when the returned values were not actually hashable. The behavior is repaired to test the objects as they are received for hashability in this case, raising an informative error message if not. Note that for values of "known unhashability", such as when the :class:`_types.JSON` or :class:`_types.ARRAY` types are used directly, an informative error message was already raised. The "hashabiltiy testing" fix here is applied to legacy :class:`.Query` as well, however in the legacy case, :meth:`_engine.Result.unique` is used for nearly all queries, so no new warning is emitted here; the legacy behavior of falling back to using ``id()`` in this case is maintained, with the improvement that an unknown type that turns out to be hashable will now be uniqufied, whereas previously it would not. .. change:: :tags: bug, orm :tickets: 10453 Fixed regression in recently revised "insertmanyvalues" feature (likely issue :ticket:`9618`) where the ORM would inadvertently attempt to interpret a non-RETURNING result as one with RETURNING, in the case where the ``implicit_returning=False`` parameter were applied to the mapped :class:`.Table`, indicating that "insertmanyvalues" cannot be used if the primary key values are not provided. .. change:: :tags: bug, engine Fixed issue within some dialects where the dialect could incorrectly return an empty result set for an INSERT statement that does not actually return rows at all, due to artfacts from pre- or post-fetching the primary key of the row or rows still being present. Affected dialects included asyncpg, all mssql dialects. .. change:: :tags: bug, typing :tickets: 10451 Fixed typing issue where the argument list passed to :class:`.Values` was too-restrictively tied to ``List`` rather than ``Sequence``. Pull request courtesy Iuri de Silvio. .. change:: :tags: bug, orm :tickets: 10365 Fixed bug where ORM :func:`_orm.with_loader_criteria` would not apply itself to a :meth:`_sql.Select.join` where the ON clause were given as a plain SQL comparison, rather than as a relationship target or similar. .. change:: :tags: bug, sql :tickets: 10408 Fixed issue where referring to a FROM entry in the SET clause of an UPDATE statement would not include it in the FROM clause of the UPDATE statement, if that entry were nowhere else in the statement; this occurs currently for CTEs that were added using :meth:`.Update.add_cte` to provide the desired CTE at the top of the statement. .. change:: :tags: bug, mariadb :tickets: 10396 Modified the mariadb-connector driver to pre-load the ``cursor.rowcount`` value for all queries, to suit tools such as Pandas that hardcode to calling :attr:`.Result.rowcount` in this way. SQLAlchemy normally pre-loads ``cursor.rowcount`` only for UPDATE/DELETE statements and otherwise passes through to the DBAPI where it can return -1 if no value is available. However, mariadb-connector does not support invoking ``cursor.rowcount`` after the cursor itself is closed, raising an error instead. Generic test support has been added to ensure all backends support the allowing :attr:`.Result.rowcount` to succceed (that is, returning an integer value with -1 for "not available") after the result is closed. .. change:: :tags: bug, mariadb Additional fixes for the mariadb-connector dialect to support UUID data values in the result in INSERT..RETURNING statements. .. change:: :tags: bug, mssql :tickets: 10458 Fixed bug where the rule that prevents ORDER BY from emitting within subqueries on SQL Server was not being disabled in the case where the :meth:`.select.fetch` method were used to limit rows in conjunction with WITH TIES or PERCENT, preventing valid subqueries with TOP / ORDER BY from being used. .. change:: :tags: bug, sql :tickets: 10443 Fixed 2.0 regression where the :class:`.DDL` construct would no longer ``__repr__()`` due to the removed ``on`` attribute not being accommodated. Pull request courtesy Iuri de Silvio. .. change:: :tags: orm, usecase :tickets: 10202 Added method :meth:`_orm.Session.get_one` that behaves like :meth:`_orm.Session.get` but raises an exception instead of returning ``None`` if no instance was found with the provided primary key. Pull request courtesy of Carlos Sousa. .. change:: :tags: asyncio, bug Fixed the :paramref:`_asyncio.AsyncSession.get.execution_options` parameter which was not being propagated to the underlying :class:`_orm.Session` and was instead being ignored. .. change:: :tags: bug, orm :tickets: 10412 Fixed issue where :class:`.Mapped` symbols like :class:`.WriteOnlyMapped` and :class:`.DynamicMapped` could not be correctly resolved when referenced as an element of a sub-module in the given annotation, assuming string-based or "future annotations" style annotations. .. change:: :tags: bug, engine :tickets: 10414 Fixed issue where under some garbage collection / exception scenarios the connection pool's cleanup routine would raise an error due to an unexpected set of state, which can be reproduced under specific conditions. .. change:: :tags: bug, typing Updates to the codebase to support Mypy 1.6.0. .. change:: :tags: usecase, orm :tickets: 7787 Added an option to permanently close sessions. Set to ``False`` the new parameter :paramref:`_orm.Session.close_resets_only` will prevent a :class:`_orm.Session` from performing any other operation after :meth:`_orm.Session.close` has been called. Added new method :meth:`_orm.Session.reset` that will reset a :class:`_orm.Session` to its initial state. This is an alias of :meth:`_orm.Session.close`, unless :paramref:`_orm.Session.close_resets_only` is set to ``False``. .. change:: :tags: orm, bug :tickets: 10385 Fixed issue with ``__allow_unmapped__`` declarative option where types that were declared using collection types such as ``list[SomeClass]`` vs. the typing construct ``List[SomeClass]`` would fail to be recognized correctly. Pull request courtesy Pascal Corpet. .. changelog:: ``` ### 2.0.21 ``` :released: September 18, 2023 .. change:: :tags: bug, sql :tickets: 9610 Adjusted the operator precedence for the string concatenation operator to be equal to that of string matching operators, such as :meth:`.ColumnElement.like`, :meth:`.ColumnElement.regexp_match`, :meth:`.ColumnElement.match`, etc., as well as plain ``==`` which has the same precedence as string comparison operators, so that parenthesis will be applied to a string concatenation expression that follows a string match operator. This provides for backends such as PostgreSQL where the "regexp match" operator is apparently of higher precedence than the string concatenation operator. .. change:: :tags: bug, sql :tickets: 10342 Qualified the use of ``hashlib.md5()`` within the DDL compiler, which is used to generate deterministic four-character suffixes for long index and constraint names in DDL statements, to include the Python 3.9+ ``usedforsecurity=False`` parameter so that Python interpreters built for restricted environments such as FIPS do not consider this call to be related to security concerns. .. change:: :tags: bug, postgresql :tickets: 10226 Fixed regression which appeared in 2.0 due to :ticket:`8491` where the revised "ping" used for PostgreSQL dialects when the :paramref:`_sa.create_engine.pool_pre_ping` parameter is in use would interfere with the use of asyncpg with PGBouncer "transaction" mode, as the multiple PostgreSQL commands emitted by asnycpg could be broken out among multiple connections leading to errors, due to the lack of any transaction around this newly revised "ping". The ping is now invoked within a transaction, in the same way that is implicit with all other backends that are based on the pep-249 DBAPI; this guarantees that the series of PG commands sent by asyncpg for this command are invoked on the same backend connection without it jumping to a different connection mid-command. The transaction is not used if the asyncpg dialect is used in "AUTOCOMMIT" mode, which remains incompatible with pgbouncer transaction mode. .. change:: :tags: bug, orm :tickets: 10279 Adjusted the ORM's interpretation of the "target" entity used within :class:`.Update` and :class:`.Delete` to not interfere with the target "from" object passed to the statement, such as when passing an ORM-mapped :class:`_orm.aliased` construct that should be maintained within a phrase like "UPDATE FROM". Cases like ORM session synchonize using "SELECT" statements such as with MySQL/ MariaDB will still have issues with UPDATE/DELETE of this form so it's best to disable synchonize_session when using DML statements of this type. .. change:: :tags: bug, orm :tickets: 10348 Added new capability to the :func:`_orm.selectin_polymorphic` loader option which allows other loader options to be bundled as siblings, referring to one of its subclasses, within the sub-options of parent loader option. Previously, this pattern was only supported if the :func:`_orm.selectin_polymorphic` were at the top level of the options for the query. See new documentation section for example. As part of this change, improved the behavior of the :meth:`_orm.Load.selectin_polymorphic` method / loader strategy so that the subclass load does not load most already-loaded columns from the parent table, when the option is used against a class that is already being relationship-loaded. Previously, the logic to load only the subclass columns worked only for a top level class load. .. seealso:: :ref:`polymorphic_selectin_as_loader_option_target_plus_opts` .. change:: :tags: bug, typing :tickets: 10264, 9284 Fixed regression introduced in 2.0.20 via :ticket:`9600` fix which attempted to add more formal typing to :paramref:`_schema.MetaData.naming_convention`. This change prevented basic naming convention dictionaries from passing typing and has been adjusted so that a plain dictionary of strings for keys as well as dictionaries that use constraint types as keys or a mix of both, are again accepted. As part of this change, lesser used forms of the naming convention dictionary are also typed, including that it currently allows for ``Constraint`` type objects as keys as well. .. change:: :tags: usecase, typing :tickets: 10288 Made the contained type for :class:`.Mapped` covariant; this is to allow greater flexibility for end-user typing scenarios, such as the use of protocols to represent particular mapped class structures that are passed to other functions. As part of this change, the contained type was also made covariant for dependent and related types such as :class:`_orm.base.SQLORMOperations`, :class:`_orm.WriteOnlyMapped`, and :class:`_sql.SQLColumnExpression`. Pull request courtesy Roméo Després. .. change:: :tags: bug, engine :tickets: 10275 Fixed a series of reflection issues affecting the PostgreSQL, MySQL/MariaDB, and SQLite dialects when reflecting foreign key constraints where the target column contained parenthesis in one or both of the table name or column name. .. change:: :tags: bug, sql :tickets: 10280 The :class:`.Values` construct will now automatically create a proxy (i.e. a copy) of a :class:`_sql.column` if the column were already associated with an existing FROM clause. This allows that an expression like ``values_obj.c.colname`` will produce the correct FROM clause even in the case that ``colname`` was passed as a :class:`_sql.column` that was already used with a previous :class:`.Values` or other table construct. Originally this was considered to be a candidate for an error condition, however it's likely this pattern is already in widespread use so it's now added to support. .. change:: :tags: bug, setup :tickets: 10321 Fixed very old issue where the full extent of SQLAlchemy modules, including ``sqlalchemy.testing.fixtures``, could not be imported outside of a pytest run. This suits inspection utilities such as ``pkgutil`` that attempt to import all installed modules in all packages. .. change:: :tags: usecase, sql :tickets: 10269 Adjusted the :class:`_types.Enum` datatype to accept an argument of ``None`` for the :paramref:`_types.Enum.length` parameter, resulting in a VARCHAR or other textual type with no length in the resulting DDL. This allows for new elements of any length to be added to the type after it exists in the schema. Pull request courtesy Eugene Toder. .. change:: :tags: bug, typing :tickets: 9878 Fixed the type annotation for ``__class_getitem__()`` as applied to the ``Visitable`` class at the base of expression constructs to accept ``Any`` for a key, rather than ``str``, which helps with some IDEs such as PyCharm when attempting to write typing annotations for SQL constructs which include generic selectors. Pull request courtesy Jordan Macdonald. .. change:: :tags: bug, typing :tickets: 10353 Repaired the core "SQL element" class ``SQLCoreOperations`` to support the ``__hash__()`` method from a typing perspective, as objects like :class:`.Column` and ORM :class:`.InstrumentedAttribute` are hashable and are used as dictionary keys in the public API for the :class:`_dml.Update` and :class:`_dml.Insert` constructs. Previously, type checkers were not aware the root SQL element was hashable. .. change:: :tags: bug, typing :tickets: 10337 Fixed typing issue with :meth:`_sql.Existing.select_from` that prevented its use with ORM classes. .. change:: :tags: usecase, sql :tickets: 9873 Added new generic SQL function :class:`_functions.aggregate_strings`, which accepts a SQL expression and a decimeter, concatenating strings on multiple rows into a single aggregate value. The function is compiled on a per-backend basis, into functions such as ``group_concat(),`` ``string_agg()``, or ``LISTAGG()``. Pull request courtesy Joshua Morris. .. change:: :tags: typing, bug :tickets: 10131 Update type annotations for ORM loading options, restricting them to accept only `"*"` instead of any string for string arguments. Pull request courtesy Janek Nouvertné. .. changelog:: ``` ### 2.0.20 ``` :released: August 15, 2023 .. change:: :tags: bug, orm :tickets: 10169 Fixed issue where the ORM's generation of a SELECT from a joined inheritance model with same-named columns in superclass and subclass would somehow not send the correct list of column names to the :class:`.CTE` construct, when the RECURSIVE column list were generated. .. change:: :tags: bug, typing :tickets: 9185 Typing improvements: * :class:`.CursorResult` is returned for some forms of :meth:`_orm.Session.execute` where DML without RETURNING is used * fixed type for :paramref:`_orm.Query.with_for_update.of` parameter within :meth:`_orm.Query.with_for_update` * improvements to ``_DMLColumnArgument`` type used by some DML methods to pass column expressions * Add overload to :func:`_sql.literal` so that it is inferred that the return type is ``BindParameter[NullType]`` where :paramref:`_sql.literal.type_` param is None * Add overloads to :meth:`_sql.ColumnElement.op` so that the inferred type when :paramref:`_sql.ColumnElement.op.return_type` is not provided is ``Callable[[Any], BinaryExpression[Any]]`` * Add missing overload to :meth:`_sql.ColumnElement.__add__` Pull request courtesy Mehdi Gmira. .. change:: :tags: usecase, orm :tickets: 10192 Implemented the "RETURNING '*'" use case for ORM enabled DML statements. This will render in as many cases as possible and return the unfiltered result set, however is not supported for multi-parameter "ORM bulk INSERT" statements that have specific column rendering requirements. .. change:: :tags: bug, typing :tickets: 10182 Fixed issue in :class:`_orm.Session` and :class:`_asyncio.AsyncSession` methods such as :meth:`_orm.Session.connection` where the :paramref:`_orm.Session.connection.execution_options` parameter were hardcoded to an internal type that is not user-facing. .. change:: :tags: orm, bug :tickets: 10231 Fixed fairly major issue where execution options passed to :meth:`_orm.Session.execute`, as well as execution options local to the ORM executed statement itself, would not be propagated along to eager loaders such as that of :func:`_orm.selectinload`, :func:`_orm.immediateload`, and :meth:`_orm.subqueryload`, making it impossible to do things such as disabling the cache for a single statement or using ``schema_translate_map`` for a single statement, as well as the use of user-custom execution options. A change has been made where **all** user-facing execution options present for :meth:`_orm.Session.execute` will be propagated along to additional loaders. As part of this change, the warning for "excessively deep" eager loaders leading to caching being disabled can be silenced on a per-statement basis by sending ``execution_options={"compiled_cache": None}`` to :meth:`_orm.Session.execute`, which will disable caching for the full series of statements within that scope. .. change:: :tags: usecase, asyncio :tickets: 9698 Added new methods :meth:`_asyncio.AsyncConnection.aclose` as a synonym for :meth:`_asyncio.AsyncConnection.close` and :meth:`_asyncio.AsyncSession.aclose` as a synonym for :meth:`_asyncio.AsyncSession.close` to the :class:`_asyncio.AsyncConnection` and :class:`_asyncio.AsyncSession` objects, to provide compatibility with Python standard library ``contextlib.aclosin