Django 4.2 minor features ¶

https://docs.djangoproject.com/en/dev/releases/4.2/#minor-features

Django.contrib.admin ¶

The light or dark color theme of the admin can now be toggled in the UI, as well as being set to follow the system setting.
The admin’s font stack now prefers system UI fonts and no longer requires downloading fonts. Additionally, CSS variables are available to more easily override the default font families.
The admin/delete_confirmation.html template now has some additional blocks and scripting hooks to ease customization.
The chosen options of filter_horizontal and filter_vertical widgets are now filterable.
The admin/base.html template now has a new block nav-breadcrumbs which contains the navigation landmark and the breadcrumbs block.
ModelAdmin.list_editable now uses atomic transactions when making edits.
jQuery is upgraded from version 3.6.0 to 3.6.4.

Django.contrib.gis ¶

The GeoJSON serializer now outputs the id key for serialized features, which defaults to the primary key of objects.
The GDALRaster class now supports pathlib.Path.
The GeoIP2 class now supports .mmdb files downloaded from DB-IP.
The OpenLayers template widget no longer includes inline CSS (which also removes the former map_css block) to better comply with a strict Content Security Policy.
OpenLayersWidget is now based on OpenLayers 7.2.2 (previously 4.6.5).
The new isempty lookup and IsEmpty() expression allow filtering empty geometries on PostGIS.
The new FromWKB() and FromWKT() functions allow creating geometries from Well-known binary (WKB) and Well-known text (WKT) representations.

django.contrib.postgres ¶

The new trigram_strict_word_similar lookup, and the TrigramStrictWordSimilarity() and TrigramStrictWordDistance() expressions allow using trigram strict word similarity.
The arrayfield.overlap lookup now supports QuerySet.values() and values_list() as a right-hand side

Database backends ¶

The new “assume_role” option is now supported in OPTIONS on PostgreSQL to allow specifying the session role.
The new “server_side_binding” option is now supported in OPTIONS on PostgreSQL with psycopg 3.1.8+ to allow using server-side binding cursors.

Internationalization ¶

Added support and translations for the Central Kurdish (Sorani) language.
The LocaleMiddleware now respects a language from the request when i18n_patterns() is used with the prefix_default_language argument set to False.

Management Commands ¶

makemessages command now supports locales with private sub-tags such as nl_NL-x-informal.
The new makemigrations –update option merges model changes into the latest migration and optimizes the resulting operations

Models ¶

QuerySet now extensively supports filtering against Window functions with the exception of disjunctive filter lookups against window functions when performing aggregation.
prefetch_related() now supports Prefetch objects with sliced querysets.
Registering lookups on Field instances is now supported.
The new robust argument for on_commit() allows performing actions that can fail after a database transaction is successfully committed.
The new KT() expression represents the text value of a key, index, or path transform of JSONField.
Now now supports microsecond precision on MySQL and millisecond precision on SQLite.
F() expressions that output BooleanField can now be negated using ~F() (inversion operator).
Model now provides asynchronous versions of some methods that use the database, using an a prefix: adelete(), arefresh_from_db(), and asave().
Related managers now provide asynchronous versions of methods that change a set of related objects, using an a prefix : aadd(), aclear(), aremove(), and aset().
CharField.max_length is no longer required to be set on PostgreSQL, which supports unlimited VARCHAR columns

Requests and Responses ¶

StreamingHttpResponse now supports async iterators when Django is served via ASGI

Tests ¶

The test –debug-sql option now formats SQL queries with sqlparse.

The RequestFactory, AsyncRequestFactory, Client, and AsyncClient classes now support the headers parameter, which accepts a dictionary of header names and values. This allows a more natural syntax for declaring headers.

           # Before:
self.client.get("/home/", HTTP_ACCEPT_LANGUAGE="fr")
await self.async_client.get("/home/", ACCEPT_LANGUAGE="fr")

# After:
self.client.get("/home/", headers={"accept-language": "fr"})
await self.async_client.get("/home/", headers={"accept-language": "fr"})

          