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django/docs/releases/4.2.1.txt

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==========================
Django 4.2.1 release notes
==========================
*Expected May 1, 2023*
Django 4.2.1 fixes several bugs in 4.2.
Bugfixes
========
* Fixed a regression in Django 4.2 that caused a crash of ``QuerySet.defer()``
when deferring fields by attribute names (:ticket:`34458`).
* Fixed a regression in Django 4.2 that caused a crash of
:class:`~django.contrib.postgres.search.SearchVector` function with ``%``
characters (:ticket:`34459`).
* Fixed a regression in Django 4.2 that caused aggregation over query that
uses explicit grouping to group against the wrong columns (:ticket:`34464`).
* Reallowed, following a regression in Django 4.2, setting the
``"cursor_factory"`` option in :setting:`OPTIONS` on PostgreSQL
(:ticket:`34466`).
* Enforced UTF-8 client encoding on PostgreSQL, following a regression in
Django 4.2 (:ticket:`34470`).
* Fixed a regression in Django 4.2 where ``i18n_patterns()`` didn't respect the
``prefix_default_language`` argument when a fallback language of the default
language was used (:ticket:`34455`).
* Fixed a regression in Django 4.2 where creating copies and deep copies of
``HttpRequest``, ``HttpResponse``, and their subclasses didn't always work
correctly (:ticket:`34482`, :ticket:`34484`).
* Fixed a regression in Django 4.2 where ``timesince`` and ``timeuntil``
template filters returned incorrect results for a datetime with a non-UTC
timezone when a time difference is less than 1 day (:ticket:`34483`).
* Fixed a regression in Django 4.2 that caused a crash of
:class:`~django.contrib.postgres.search.SearchHeadline` function with
``psycopg`` 3 (:ticket:`34486`).
* Fixed a regression in Django 4.2 that caused incorrect ``ClearableFileInput``
margins in the admin (:ticket:`34506`).