• Add fixer selection options: --only <name>, --skip <name>, and --list-fixers.

  Thanks to Gav O'Connor and David Szotten in PR #443.

• Run per-file conditions once, yielding a performance improvement of ~2% measured on a real-world project.

• Remove the Django 5.0+ fixer that dropped .choices from model field choices parameters. It was too unreliable because it could break use for “DIY” enumeration types.

  Thanks to Niccolò Mineo and washeck for reporting in Issue #417.

• Add Django 1.10+ fixer to rewrite request.user functions that changed to boolean attributes: is_authenticated and is_anonymous.

  Thanks to Alessandro Ferrini in PR #423.

• Add Django 2.0+ imports fixes for names moved from django.core.urlresolvers to django.urls.

  Thanks to Thibaut Decombe in PR #404.

• Support Django 5.0 as a target version.

• Add Django 5.0+ fixer to drop .choices on model field choices parameters when using an enumeration type.

  Thanks to Thibaut Decombe in PR #369.

• Add some compatibility import replacements for Django 4.0 and below.

  Thanks to Thibaut Decombe in PR #368.

• Fix issue with @admin.register() checker

  Thanks to Jan Pieter Waagmeester for the report in Issue #337, and to Thibaut Decombe for the review in PR #338.

• Fix bug in STORAGES fixer when only one of DEFAULT_FILE_STORAGE or STATICFILES_STORAGE was defined.

  Thanks to Bruno Alla in PR #376.

• Support Python 3.12.

• Add Django 4.2+ fixer to combine deprecated DEFAULT_FILE_STORAGE and STATICFILES_STORAGE settings into the new STORAGES setting.

• Add Django 4.2+ fixer to rewrite HTTP headers passed to test Client and RequestFactory.

  Thanks to David Wobrock in PR #305.

• Add Django 4.2+ fixer to rewrite test case methods assertFormsetError() and assertQuerysetEqual() into the new spellings with capitalized “Set”.

  Thanks to Michael Howitz in PR #253.

• Add Django 4.0 fixer to rewrite django.contrib.admin.utils.lookup_needs_distinct -> lookup_spawns_duplicates.

  Thanks to Bruno Alla in PR #313.

• Rewrite request.META -> request.headers on the right hand side of assignments.

• Group some compatibility import replacements into a single “fixer”, optimizing runtime by about 3%.

  Thanks to Thibaut Decombe in PR #295.

• Make re_path -> path fixer also convert include()'s with unterminated regexes.

  Thanks to Thibaut Decombe in PR #279.

• Avoid rewriting request.META to request.headers in del statements. This pattern works for request.META but not for request.headers which is an immutable mapping.

  Thanks to Thibaut Decombe in PR #290.

• Add Django 1.9+ fixer to rename the legacy engine name django.db.backends.postgresql_psycopg2 in settings.DATABASES to django.db.backends.postgresql.

  Thanks to Thibaut Decombe in PR #280.

• Make detection of management commands and migration files detect both forward and backward slashes as directory separators.

  Thanks to William Claassen in PR #286.

See also the release blog post.

• Add Django 1.7+ fixer to rewrite admin.site.register() calls into @admin.register() when eligible.

  Thanks to Thibaut Decombe in PR #189.

• Add Django 3.2+ fixer to rewrite admin action function attributes to use the @admin.action() decorator.
• Add Django 3.2+ fixer to rewrite admin display function attributes to use the @admin.display() decorator.
• Add Django 4.1+ fixer to rewrite calls to test case methods assertFormError() and assertFormsetError() from their old signatures to the new ones.
• Add Django 2.0+ fixer to drop assignments of allow_tags attributes to True.

• Add Django 3.1+ fixer to replace list error message key with list_invalid on ModelMultipleChoiceField.

  Thanks to Thibaut Decombe in PR #258.

• Make request.headers fixer also rewrite accesses of the content-length and content-type headers.

  Thanks to Christian Bundy in PR #226.

• Extend request.headers fixer to rewrite in and not in comparisons on request.META.

  Thanks to Daan Vielen in Issue #234.

• The request.headers fixer now uses lowercase for header lookups, as per the HTTP/2 specification.

• Make on_delete fixer also support ForeignKey and OneToOneField imported from django.db.models.

  Thanks to Thibaut Decombe in PR #236.

• Make NullBooleanField fixer preserve existing null arguments.

  Thanks to Joseph Zammit in Issue #245.

• Update timezone.utc fixer to only use absolute references from existing imports of the datetime module.

• Make Django 2.0+ URL fixer avoid a loop of adding imports that already exist.

  Thanks to Benjamin Bach for the report in Issue #250, and to Thibaut Decombe for the fix in PR #270.

• Fixers that modify string literals now match existing use of double quotes.

  Thanks to Kevin Marsh in PR #260.

• Make fixers that erase lines also erase any trailing comments.
• Fix leaving a trailing comma when editing imports in certain cases.
• Expand the range of files considered settings files.

• Require at least one filename.

  Thanks to Daan Vielen in Issue #238.

• Update README with info on how to run an upgrade on entire project.

  Thanks to Daan Vielen in Issue #240.

• Add Django 3.2+ fixer to update requires_system_checks in management command classes.

  Thanks to Bruno Alla in PR #184.

• Add Django 4.0+ fixer to remove USE_L10N = True setting.

  Thanks to Johnny Metz in PR #173.

• Add fixer to remove outdated blocks based on comparing django.VERSION to old versions:

  -if django.VERSION > (4, 1):
  -    constraint.validate()
  +constraint.validate()

• Update Django 2.0+ URL fixer to rewrite re_path() calls into path() when eligible.

  Thanks to Thibaut Decombe in PR #167.

• Fix timezone.utc fixer to import and use timezone.utc correctly.

  Thanks to Víðir Valberg Guðmundsson for the report in Issue #172.

• Support Django 4.1 as a target version.

• Add Django 4.1+ fixer to rewrite imports of utc from django.utils.timezone to use datetime.timezone.

  Thanks to Hasan Ramezani in PR #169.

• Support Python 3.11.

• Fix default_app_config fixer to work with __init__.py files in subdirectories.

  Thanks to Bruno Alla in PR #144.

• Add --version flag.

  Thanks to Ferran Jovell in PR #143.

• Add Django 3.2+ fixer to remove default_app_config assignments in __init__.py files.

  Thanks to Bruno Alla in PR #140.

• Fix URL rewriting to avoid converting regular expressions that don’t end with $. If the $ is missing, Django will search for the given regular expression anywhere in the path.

  Thanks to qdufrois for the report in Issue #121.

• Made JSONField and NullBooleanField fixers ignore migrations files. Django kept these old field classes around for use in historical migrations, so there’s no need to rewrite such cases.

  Thanks to Matthieu Rigal and Bruno Alla for the report in Issue #79.

• Add Django 2.0+ fixer to rewrite imports of lru_cache from django.utils.functional to use functools.
• Support Django 4.0 as a target version. There are no fixers for it at current. Most of its deprecations don’t seem automatically fixable.

• Avoid rewriting request.META to request.headers in assignments. This pattern is used in tests, and works for request.META but not request.headers.

  Thanks to Bruno Alla for the report in Issue #74.

• Fix import fixers to not crash on star imports (from foo import *).

  Thanks to Mikhail for the report in Issue #70.

• Fix get_random_string() fixer to not add the argument to calls like crypto.get_random_string(12).

• Add fixers to remove various compatibility imports removed in Django 3.1.

  Thanks to Bruno Alla in PR #44.

• Add fixer for Django 2.2 to rewrite request.META access of headers to HttpRequest.headers.

• Add fixer for Django 2.0 to rewrite include() and url() from django.conf.urls to django.urls. url() may be rewritten to path() or re_path() accordingly.

  Thanks to Bruno Alla for the original implementation of regex-to-path conversion in django-codemod. Thanks to Matthias Kestenholz for an initial PR.

• Add fixer for Django 1.9 requirement to pass on_delete to ForeignKey and OneToOneField.

  Thanks to Bruno Alla in PR #61.

• Support Python 3.10.
• Support single level module imports of names too, such as using o from django.utils import crypto with crypto.get_random_string().
• Add fixer for Django 3.1 deprecation of NullBooleanField.
• Add fixers for Django 3.0 deprecation of functions in django.utils.http, django.utils.text, and django.utils.translation.
• Add fixer for Django 2.2 rename of FloatRangeField to DecimalRangeField.
• Add fixer for Django 2.2 deprecation of test case attributes allow_database_queries and multi_db.
• Fix inserted imports to match indentation of the point they are inserted.

• Add fixer for Django 3.1 JSONField moves.
• Add fixer for Django 3.1 removal of Signal’s argument providing_args.
• Add fixer for Django 3.1 requirement to pass get_random_string() the length argument.
• Fix Python 3.8 compatibility.
• Drop Python 3.6 and 3.7 support, since they never worked, and the incompatibilities in the ast module are hard to cover.

• Initial release.