Release notes Django 1.5.4 release notes

Fixed a bug that prevented a QuerySet that uses prefetch_related() from being pickled and unpickled more than once (the second pickling attempt raised an exception) (#21102).

Release notes Django 2.0.3 release notes

Fixed a regression that caused sliced QuerySet.distinct().order_by() followed by count() to crash (#29108). Prioritized the datetime and time input formats without %f for the Thai locale to fix the admin time picker widget displaying “undefined” (#29109).

Release notes Django 2.0.9 release notes

Fixed a race condition in QuerySet.update_or_create() that could result in data loss (#29499).

Release notes Django 2.1.1 release notes

Fixed a race condition in QuerySet.update_or_create() that could result in data loss (#29499). Fixed a regression where QueryDict.urlencode() crashed if the dictionary contains a non-string value (#29627).

Release notes Django 2.2 release notes What’s new in Django 2.2Minor features

Added result streaming for QuerySet.iterator() on SQLite.

Release notes Django 3.2 release notes What’s new in Django 3.2Minor features

The new no_key parameter for QuerySet.select_for_update(), supported on PostgreSQL, allows acquiring weaker locks that don’t block the creation of rows that reference locked rows through a foreign key. When() expression now allows using the condition argument with lookups.

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

Added the skip_locked argument to QuerySet.select_for_update() on PostgreSQL 9.5+ and Oracle to execute queries with FOR UPDATE SKIP LOCKED. Added the TEST['TEMPLATE'] setting to let PostgreSQL users specify a template for creating the test database.

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

Added support for callable values in the defaults argument of QuerySet.update_or_create() and get_or_create(). ImageField now has a default validate_image_file_extension validator. (This validator moved to the form field in Django 1.11.2.) Added support for time truncation to Trunc functions.

Release notes Django 1.11 release notes Backwards incompatible changes in 1.11

The change to make QuerySet.iterator() use server-side cursors on PostgreSQL prevents running Django with PgBouncer in transaction pooling mode. To reallow that, use the DISABLE_SERVER_SIDE_CURSORS setting (added in Django 1.11.1) in DATABASES.

Release notes Django 1.4 release notes What’s new in Django 1.4

Django 1.4 includes a QuerySet.select_for_update() method, which generates a SELECT ... FOR UPDATE SQL query. This will lock rows until the end of the transaction, meaning other transactions cannot modify or delete rows matched by a FOR UPDATE query.

Release notes Django 1.5.2 release notes

Fixed a crash with prefetch_related() (#19607) as well as some pickle regressions with prefetch_related (#20157 and #20257). Fixed a regression in django.contrib.gis in the Google Map output on Python 3 (#20773).

Release notes Django 2.2.4 release notes

Fixed a regression in Django 2.2 when ordering a QuerySet.union(), intersection(), or difference() by a field type present more than once results in the wrong ordering being used (#30628).

Release notes Django 4.2.26 release notes

QuerySet.filter(), exclude(), get(), and Q were subject to SQL injection using a suitably crafted dictionary, with dictionary expansion, as the _connector argument.

Release notes Django 1.7.11 release notes

Fixed a data loss possibility with Prefetch if to_attr is set to a ManyToManyField (#25693).

Release notes Django 1.11.1 release notes

The change in Django 1.11 to make QuerySet.iterator() use server-side cursors on PostgreSQL prevents running Django with PgBouncer in transaction pooling mode. To reallow that, use the DISABLE_SERVER_SIDE_CURSORS setting in DATABASES. See Transaction pooling and server-side cursors for more discussion.

Release notes Django 1.11.25 release notes

Fixed a crash when filtering with a Subquery() annotation of a queryset containing django.contrib.postgres.fields.JSONField or HStoreField (#30769).

Release notes Django 1.5 release notes Backwards incompatible changes in 1.5

django.forms.ModelMultipleChoiceField now returns an empty QuerySet as the empty value instead of an empty list. int_to_base36() properly raises a TypeError instead of ValueError for non-integer inputs. The slugify template filter is now available as a standard Python function at django.utils.text.slugify().

Release notes Django 1.5 release notes Features deprecated in 1.5

The depth keyword argument in select_related() has been deprecated. You should use field names instead.

Release notes Django 1.7 release notes What’s new in Django 1.7

The new Prefetch object allows customizing prefetch operations. You can specify the QuerySet used to traverse a given relation or customize the storage location of prefetch results.

Release notes Django 1.8.6 release notes

Fixed a regression causing ModelChoiceField to ignore prefetch_related() on its queryset (#25496). Allowed “mode=memory” in SQLite test database name if supported (#12118). Fixed system check crash on ForeignKey to abstract model (#25503).