Django 2.0 release notes - UNDER DEVELOPMENT

Welcome to Django 2.0!

These release notes cover the new features, as well as some backwards incompatible changes you’ll want to be aware of when upgrading from Django 1.11 or earlier. We’ve dropped some features that have reached the end of their deprecation cycle, and we’ve begun the deprecation process for some features.

See the Upgrading Django to a newer version guide if you’re updating an existing project.

Python compatibility

Django 2.0 supports Python 3.5+. Since Django 1.11, support for Python 2.7 and 3.4 is removed. We highly recommend and only officially support the latest release of each series.

Third-party library support for older version of Django

Following the release of Django 2.0, we suggest that third-party app authors drop support for all versions of Django prior to 1.11. At that time, you should be able run your package’s tests using python -Wd so that deprecation warnings do appear. After making the deprecation warning fixes, your app should be compatible with Django 2.0.

What’s new in Django 2.0

Minor features

django.contrib.auth

  • The default iteration count for the PBKDF2 password hasher is increased from 36,000 to 100,000.

Cache

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CSRF

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Database backends

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Email

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File Storage

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File Uploads

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Forms

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Generic Views

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Internationalization

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Management Commands

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Migrations

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Models

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Requests and Responses

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Serialization

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Signals

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Templates

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Tests

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URLs

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Validators

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Backwards incompatible changes in 2.0

Database backend API

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Miscellaneous

  • The SessionAuthenticationMiddleware class is removed. It provided no functionality since session authentication is unconditionally enabled in Django 1.10.

Features deprecated in 2.0

Miscellaneous

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Features removed in 2.0

These features have reached the end of their deprecation cycle and are removed in Django 2.0. See Features deprecated in 1.9 and Features deprecated in 1.10 for details, including how to remove usage of these features.

  • The weak argument to django.dispatch.signals.Signal.disconnect() is removed.
  • django.db.backends.base.BaseDatabaseOperations.check_aggregate_support() is removed.
  • The django.forms.extras package is removed.
  • The assignment_tag helper is removed.
  • The host argument to SimpleTestCase.assertsRedirects() is removed. The compatibility layer which allows absolute URLs to be considered equal to relative ones when the path is identical is also removed.
  • Field.rel and Field.remote_field.to are removed.
  • The on_delete argument for ForeignKey and OneToOneField are now required.
  • django.db.models.fields.add_lazy_relation() is removed.
  • When time zone support is enabled, database backends that don’t support time zones no longer convert aware datetimes to naive values in UTC anymore when such values are passed as parameters to SQL queries executed outside of the ORM, e.g. with cursor.execute().
  • django.contrib.auth.tests.utils.skipIfCustomUser() is removed.
  • The GeoManager and GeoQuerySet classes are removed.
  • The django.contrib.gis.geoip module is removed.
  • The supports_recursion check for template loaders is removed from:
    • django.template.engine.Engine.find_template()
    • django.template.loader_tags.ExtendsNode.find_template()
    • django.template.loaders.base.Loader.supports_recursion()
    • django.template.loaders.cached.Loader.supports_recursion()
  • The load_template and load_template_sources template loader methods are removed.
  • The template_dirs argument for template loaders is removed:
    • django.template.loaders.base.Loader.get_template()
    • django.template.loaders.cached.Loader.cache_key()
    • django.template.loaders.cached.Loader.get_template()
    • django.template.loaders.cached.Loader.get_template_sources()
    • django.template.loaders.filesystem.Loader.get_template_sources()
  • django.template.loaders.base.Loader.__call__() is removed.
  • Support for custom error views that don’t accept an exception parameter is removed.
  • The mime_type attribute of django.utils.feedgenerator.Atom1Feed and django.utils.feedgenerator.RssFeed is removed.
  • The app_name argument to include() is removed.
  • Support for passing a 3-tuple as the first argument to include() is removed.
  • Support for setting a URL instance namespace without an application namespace is removed.
  • Field._get_val_from_obj() is removed.
  • django.template.loaders.eggs.Loader is removed.
  • The current_app parameter to the contrib.auth function-based views is removed.
  • The callable_obj keyword argument to SimpleTestCase.assertRaisesMessage() is removed.
  • Support for the allow_tags attribute on ModelAdmin methods is removed.
  • The enclosure keyword argument to SyndicationFeed.add_item() is removed.
  • The django.template.loader.LoaderOrigin and django.template.base.StringOrigin aliases for django.template.base.Origin are removed.
  • The makemigrations --exit option is removed.
  • Support for direct assignment to a reverse foreign key or many-to-many relation is removed.
  • The get_srid() and set_srid() methods of django.contrib.gis.geos.GEOSGeometry are removed.
  • The get_x(), set_x(), get_y(), set_y(), get_z(), and set_z() methods of django.contrib.gis.geos.Point are removed.
  • The get_coords() and set_coords() methods of django.contrib.gis.geos.Point are removed.
  • The cascaded_union property of django.contrib.gis.geos.MultiPolygon is removed.
  • django.utils.functional.allow_lazy() is removed.
  • The shell --plain option is removed.
  • The django.core.urlresolvers module is removed.
  • CommaSeparatedIntegerField is removed, except for support in historical migrations.
  • The template Context.has_key() method is removed.
  • Support for the django.core.files.storage.Storage.accessed_time(), created_time(), and modified_time() methods is removed.
  • Support for query lookups using the model name when Meta.default_related_name is set is removed.
  • The MySQL __search lookup is removed.
  • The shim for supporting custom related manager classes without a _apply_rel_filters() method is removed.
  • Using User.is_authenticated() and User.is_anonymous() as methods rather than properties is no longer be supported.
  • The Model._meta.virtual_fields attribute is removed.
  • The keyword arguments virtual_only in Field.contribute_to_class() and virtual in Model._meta.add_field() are removed.
  • The javascript_catalog() and json_catalog() views are removed.
  • django.contrib.gis.utils.precision_wkt() is removed.
  • In multi-table inheritance, implicit promotion of a OneToOneField to a parent_link is removed.
  • Support for Widget._format_value() is removed.
  • FileField methods get_directory_name() and get_filename() are removed.
  • The mark_for_escaping() function and the classes it uses: EscapeData, EscapeBytes, EscapeText, EscapeString, and EscapeUnicode are removed.
  • The escape filter now uses django.utils.html.conditional_escape().
  • Manager.use_for_related_fields is removed.
  • Model Manager inheritance follows MRO inheritance rules. The requirement to use Meta.manager_inheritance_from_future to opt-in to the behavior is removed.
  • Support for old-style middleware using settings.MIDDLEWARE_CLASSES is removed.