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Bugfixes

Release notes Django 4.2.4 release notes

Fixed a regression in Django 4.2 that caused a crash of QuerySet.aggregate() with aggregates referencing window functions (#34717). Fixed a regression in Django 4.2 that caused a crash when grouping by a reference in a subquery (#34748).

Bugfixes

Release notes Django 4.2.7 release notes

Fixed a regression in Django 4.2 that caused a crash of QuerySet.aggregate() with aggregates referencing expressions containing subqueries (#34798). Restored, following a regression in Django 4.2, creating varchar/text_pattern_ops indexes on CharField and TextField with deterministic collations on PostgreSQL (#34932).

Bugfixes

Release notes Django 1.11.12 release notes

Fixed a regression in Django 1.11.8 where combining two annotated values_list() querysets with union(), difference(), or intersection() crashed due to mismatching columns (#29229).

Bugfixes

Release notes Django 2.2.3 release notes CVE-2019-12781: Incorrect HTTP detection with reverse-proxy connecting via HTTPS

Fixed a regression in Django 2.2 where Avg, StdDev, and Variance crash with filter argument (#30542). Fixed a regression in Django 2.2.2 where auto-reloader crashes with AttributeError, e.g. when using ipdb (#30588).

Release notes Django 1.6 release notes What’s new in Django 1.6

The support for time zones introduced in Django 1.4 didn’t work well with QuerySet.dates(): aggregation was always performed in UTC. This limitation was lifted in Django 1.6. Use QuerySet.datetimes() to perform time zone aware aggregation on a DateTimeField.

Release notes Django 1.6.3 release notes

Historically, queries that use select_for_update() could be executed in autocommit mode, outside of a transaction. Before Django 1.6, Django’s automatic transactions mode allowed this to be used to lock records until the next write operation.

Release notes Django 1.7 release notes Backwards incompatible changes in 1.7

Historically, queries that use select_for_update() could be executed in autocommit mode, outside of a transaction. Before Django 1.6, Django’s automatic transactions mode allowed this to be used to lock records until the next write operation.

Filter expressions

Release notes Django 3.0 release notes What’s new in Django 3.0

Expressions that output BooleanField may now be used directly in QuerySet filters, without having to first annotate and then filter against the annotation.

Bugfixes

Release notes Django 3.0.6 release notes

Fixed a regression in Django 3.0 that caused a crash when filtering a Subquery() annotation of a queryset containing a single related field against a SimpleLazyObject (#31420).

Window expressions

Release notes Django 2.0 release notes What’s new in Django 2.0

The new Window expression allows adding an OVER clause to querysets. You can use window functions and aggregate functions in the expression.

Database backends

Release notes Django 1.10 release notes What’s new in Django 1.10Minor features

Temporal data subtraction was unified on all backends. If the database supports it, backends can set DatabaseFeatures.can_return_ids_from_bulk_insert=True and implement DatabaseOperations.fetch_returned_insert_ids() to set primary keys on objects created using QuerySet.bulk_create().

Models

Release notes Django 1.10 release notes What’s new in Django 1.10Minor features

The reverse relation attached by a ForeignKey pointing to a proxy model is now accessible as a descriptor on the proxied model class and may be referenced in queryset filtering.

Subquery expressions

Release notes Django 1.11 release notes What’s new in Django 1.11

The new Subquery and Exists database expressions allow creating explicit subqueries. Subqueries may refer to fields from the outer queryset using the OuterRef class.

Bugfixes

Release notes Django 1.11.4 release notes

Fixed QuerySet.union() and difference() when combining with a queryset raising EmptyResultSet (#28378). Fixed a regression in pickling of LazyObject on Python 2 when the wrapped object doesn’t have __reduce__() (#28389).

Bugfixes

Release notes Django 1.11.7 release notes

Prevented cache.get_or_set() from caching None if the default argument is a callable that returns None (#28601). Fixed the Basque DATE_FORMAT string (#28710). Made QuerySet.reverse() affect nulls_first and nulls_last (#28722). Fixed unquoted table names in Subquery SQL when using OuterRef (#28689).