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DOCSP-37363 - What's New (#33)
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‎source/upgrade.txt‎

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@@ -78,6 +78,65 @@ deprecated PyMongo features.
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`the warnings module <https://docs.python.org/3/library/warnings.html>`__
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and `the -W command line option <https://docs.python.org/3/using/cmdline.html#cmdoption-W>`__.
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Breaking Changes
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----------------
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A breaking change is a modification of a convention or a behavior starting in a specific
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version of the driver. This type of change may prevent your application from working
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properly if not addressed before upgrading the driver.
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The breaking changes in this section are categorized by the driver version that introduced
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them. When upgrading driver versions, address all the breaking changes between the current
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and upgrade versions. For example, if you're upgrading {+driver-short+} from v4.0 to v4.7,
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address all breaking changes from the version after v4.0, including any listed under v4.7.
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.. _version-4.7-breaking-changes:
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Version 4.7 Breaking Changes
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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- All occurrences of the ``SON`` collection type on all internal classes and
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commands have been changed to ``dict``.
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- The ``options.pool_options.metadata`` property is now of type ``dict``, not
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``SON``. The following code example shows the differences in how these formats
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store data:
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.. code-block:: python
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# Before
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>>> from pymongo import MongoClient
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>>> client = MongoClient()
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>>> client.options.pool_options.metadata
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SON([('driver', SON([('name', 'PyMongo'), ('version', '4.7.0.dev0')])), ('os', SON([('type', 'Darwin'), ('name', 'Darwin'), ('architecture', 'arm64'), ('version', '14.3')])), ('platform', 'CPython 3.11.6.final.0')])
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# After
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>>> client.options.pool_options.metadata
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{'driver': {'name': 'PyMongo', 'version': '4.7.0.dev0'}, 'os': {'type': 'Darwin', 'name': 'Darwin', 'architecture': 'arm64', 'version': '14.3'}, 'platform': 'CPython 3.11.6.final.0'}
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To convert a single-layer ``dict`` object to a ``SON`` object, pass the ``dict`` object to
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the ``SON`` constructor, as shown in the following example:
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.. code-block:: python
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>>> data_as_dict = client.options.pool_options.metadata
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>>> SON(data_as_dict)
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SON([('driver', {'name': 'PyMongo', 'version': '4.7.0.dev0'}), ('os', {'type': 'Darwin', 'name': 'Darwin', 'architecture': 'arm64', 'version': '14.3'}), ('platform', 'CPython 3.11.6.final.0')])
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If the ``dict`` object has multiple layers, you must convert the values one at a time,
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as shown in the following example:
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.. code-block:: python
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>>> def dict_to_SON(data_as_dict: dict[Any, Any]):
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... data_as_SON = SON()
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... for key, value in data_as_dict.items():
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... data_as_SON[key] = dict_to_SON(value) if isinstance(value, dict) else value
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... return data_as_SON
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>>>
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>>> dict_to_SON(data_as_dict)
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SON([('driver', SON([('name', 'PyMongo'), ('version', '4.7.0.dev0')])), ('os', SON([('type', 'Darwin'), ('name', 'Darwin'), ('architecture', 'arm64'), ('version', '14.3')])), ('platform', 'CPython 3.11.6.final.0')])
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.. _pymongo4-migration-guide:
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PyMongo 4 Migration Guide

‎source/whats-new.txt‎

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.. uses changelog.rst
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.. _pymongo-whats-new:
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==========
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:depth: 1
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:class: singlecol
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.. facet::
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:name: genre
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:values: reference
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What's New in 4.7
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-----------------
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.. warning:: Breaking Changes
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{+driver-short+} v4.7 contains breaking changes. For more information, see
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:ref:`version-4.7-breaking-changes`.
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The {+driver-short+} v4.7 release includes the following new features:
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- Added the ``~pymongo.hello.Hello.server_connection_id``,
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``pymongo.monitoring.CommandStartedEvent.server_connection_id``,
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``pymongo.monitoring.CommandSucceededEvent.server_connection_id``, and
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``pymongo.monitoring.CommandFailedEvent.server_connection_id`` properties.
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- Added support for named Key Management Service (KMS) providers for Client-Side Field
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Level Encryption (CSFLE).
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Previously supported KMS providers were only: aws, azure, gcp, kmip, and local.
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The KMS provider is now expanded to support name suffixes (e.g. local:myname).
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Named KMS providers enables more than one of each KMS provider type to be configured.
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See the docstring for ``~pymongo.encryption_options.AutoEncryptionOpts``.
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Note that named KMS providers requires pymongocrypt >=1.9 and libmongocrypt >=1.9.
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- Added the ``Hello.connection_id``,
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`CommandStartedEvent.server_connection_id <https://pymongo.readthedocs.io/en/latest/api/pymongo/monitoring.html#pymongo.monitoring.CommandStartedEvent.server_connection_id>`__,
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`CommandSucceededEvent.server_connection_id <https://pymongo.readthedocs.io/en/latest/api/pymongo/monitoring.html#pymongo.monitoring.CommandSucceededEvent.server_connection_id>`__,
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and `CommandFailedEvent.server_connection_id <https://pymongo.readthedocs.io/en/latest/api/pymongo/monitoring.html#pymongo.monitoring.CommandFailedEvent.server_connection_id>`__
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properties.
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- Added support for name suffixes for Key Management Service (KMS) providers for Client-Side Field
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Level Encryption (CSFLE). This feature requires ``pymongocrypt`` v1.9+ and
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``libmongocrypt`` v1.9+. For more information, see the API documentation for the
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`AutoEncryptionOpts <https://pymongo.readthedocs.io/en/latest/api/pymongo/encryption_options.html#pymongo.encryption_options.AutoEncryptionOpts>`__
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class.
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- Improved the performance of encoding BSON documents to JSON.
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- The ``~pymongo.encryption.ClientEncryption.encrypt`` method and
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the ``~pymongo.encryption.ClientEncryption.encrypt_expression`` method now allow ``key_id``
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to be passed in as a ``uuid.UUID``.
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- Fixed a bug where inflating a ``~bson.raw_bson.RawBSONDocument`` containing a
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``~bson.code.Code`` would cause an error.
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- The ``ClientEncryption.encrypt()`` and ``ClientEncryption.encrypt_expression()`` methods
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now allow the ``key_id`` argument to be passed in as a ``UUID`` Object.
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- Inflating a ``RawBSONDocument`` object containing a ``Code`` value no longer causes an
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error.
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- Fixed a bug in Python 3.12 where the error message
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``RuntimeError: can't create new thread at interpreter shutdown``
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could be written to ``stderr`` when a ``MongoClient`` thread starts as the Python
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interpreter is shutting down.
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- Fixed a bug where ``~bson.int64.Int64`` instances could not always be encoded by
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- Fixed a bug where ``Int64`` instances could not always be encoded by
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`orjson <https://github.com/ijl/orjson>`__. Code like the following example now
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run correctly:
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runs correctly:
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.. code-block:: python
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>>> import orjson
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>>> from bson import json_util
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>>> orjson.dumps({'a': Int64(1)}, default=json_util.default, option=orjson.OPT_PASSTHROUGH_SUBCLASS)
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Breaking Changes
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````````````````
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- Replaced usage of ``bson.son.SON`` on all internal classes and commands to dict,
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``options.pool_options.metadata`` is now of type ``dict`` as opposed to ``bson.son.SON``.
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Here's some examples of how this changes expected output as well as how to convert from ``dict`` to ``bson.son.SON``:
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.. code-block:: python
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# Before
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>>> from pymongo import MongoClient
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>>> client = MongoClient()
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>>> client.options.pool_options.metadata
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SON([('driver', SON([('name', 'PyMongo'), ('version', '4.7.0.dev0')])), ('os', SON([('type', 'Darwin'), ('name', 'Darwin'), ('architecture', 'arm64'), ('version', '14.3')])), ('platform', 'CPython 3.11.6.final.0')])
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# After
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>>> client.options.pool_options.metadata
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{'driver': {'name': 'PyMongo', 'version': '4.7.0.dev0'}, 'os': {'type': 'Darwin', 'name': 'Darwin', 'architecture': 'arm64', 'version': '14.3'}, 'platform': 'CPython 3.11.6.final.0'}
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# To convert from dict to SON
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# This will only convert the first layer of the dictionary
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>>> data_as_dict = client.options.pool_options.metadata
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>>> SON(data_as_dict)
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SON([('driver', {'name': 'PyMongo', 'version': '4.7.0.dev0'}), ('os', {'type': 'Darwin', 'name': 'Darwin', 'architecture': 'arm64', 'version': '14.3'}), ('platform', 'CPython 3.11.6.final.0')])
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# To convert from dict to SON on a nested dictionary
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>>> def dict_to_SON(data_as_dict: dict[Any, Any]):
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... data_as_SON = SON()
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... for key, value in data_as_dict.items():
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... data_as_SON[key] = dict_to_SON(value) if isinstance(value, dict) else value
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... return data_as_SON
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>>>
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>>> dict_to_SON(data_as_dict)
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SON([('driver', SON([('name', 'PyMongo'), ('version', '4.7.0.dev0')])), ('os', SON([('type', 'Darwin'), ('name', 'Darwin'), ('architecture', 'arm64'), ('version', '14.3')])), ('platform', 'CPython 3.11.6.final.0')])

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