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django-rest-framework/docs/topics/release-notes.md
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Release Notes

Release Early, Release Often

— Eric S. Raymond, The Cathedral and the Bazaar.

Versioning

Minor version numbers (0.0.x) are used for changes that are API compatible. You should be able to upgrade between minor point releases without any other code changes.

Medium version numbers (0.x.0) may include API changes, in line with the deprecation policy. You should read the release notes carefully before upgrading between medium point releases.

Major version numbers (x.0.0) are reserved for substantial project milestones. No major point releases are currently planned.

Deprecation policy

REST framework releases follow a formal deprecation policy, which is in line with Django's deprecation policy.

The timeline for deprecation of a feature present in version 1.0 would work as follows:

  • Version 1.1 would remain fully backwards compatible with 1.0, but would raise PendingDeprecationWarning warnings if you use the feature that are due to be deprecated. These warnings are silent by default, but can be explicitly enabled when you're ready to start migrating any required changes. For example if you start running your tests using python -Wd manage.py test, you'll be warned of any API changes you need to make.

  • Version 1.2 would escalate these warnings to DeprecationWarning, which is loud by default.

  • Version 1.3 would remove the deprecated bits of API entirely.

Note that in line with Django's policy, any parts of the framework not mentioned in the documentation should generally be considered private API, and may be subject to change.

Upgrading

To upgrade Django REST framework to the latest version, use pip:

pip install -U djangorestframework

You can determine your currently installed version using pip freeze:

pip freeze | grep djangorestframework

2.3.x series

2.3.0

  • ViewSets and Routers.
  • ModelSerializers support reverse relations in 'fields' option.
  • HyperLinkedModelSerializers support 'id' field in 'fields' option.
  • Cleaner generic views.
  • DecimalField support.
  • Bugfix: Fix issue with depth>1 on ModelSerializer.

Note: See the 2.3 announcement for full details.

2.2.x series

Master

  • Made Login template more easy to restyle.

2.2.7

Date: 17th April 2013

  • Loud failure when view does not return a Response or HttpResponse.
  • Bugfix: Fix for Django 1.3 compatiblity.
  • Bugfix: Allow overridden get_object() to work correctly.

2.2.6

Date: 4th April 2013

  • OAuth2 authentication no longer requires unneccessary URL parameters in addition to the token.
  • URL hyperlinking in browsable API now handles more cases correctly.
  • Long HTTP headers in browsable API are broken in multiple lines when possible.
  • Bugfix: Fix regression with DjangoFilterBackend not worthing correctly with single object views.
  • Bugfix: OAuth should fail hard when invalid token used.
  • Bugfix: Fix serializer potentially returning None object for models that define __bool__ or __len__.

2.2.5

Date: 26th March 2013

  • Serializer support for bulk create and bulk update operations.
  • Regression fix: Date and time fields return date/time objects by default. Fixes regressions caused by 2.2.2. See #743 for more details.
  • Bugfix: Fix 500 error is OAuth not attempted with OAuthAuthentication class installed.
  • Serializer.save() now supports arbitrary keyword args which are passed through to the object .save() method. Mixins use force_insert and force_update where appropriate, resulting in one less database query.

2.2.4

Date: 13th March 2013

  • OAuth 2 support.
  • OAuth 1.0a support.
  • Support X-HTTP-Method-Override header.
  • Filtering backends are now applied to the querysets for object lookups as well as lists. (Eg you can use a filtering backend to control which objects should 404)
  • Deal with error data nicely when deserializing lists of objects.
  • Extra override hook to configure DjangoModelPermissions for unauthenticated users.
  • Bugfix: Fix regression which caused extra database query on paginated list views.
  • Bugfix: Fix pk relationship bug for some types of 1-to-1 relations.
  • Bugfix: Workaround for Django bug causing case where Authtoken could be registered for cascade delete from User even if not installed.

2.2.3

Date: 7th March 2013

  • Bugfix: Fix None values for for DateField, DateTimeField and TimeField.

2.2.2

Date: 6th March 2013

  • Support for custom input and output formats for DateField, DateTimeField and TimeField.
  • Cleanup: Request authentication is no longer lazily evaluated, instead authentication is always run, which results in more consistent, obvious behavior. Eg. Supplying bad auth credentials will now always return an error response, even if no permissions are set on the view.
  • Bugfix for serializer data being uncacheable with pickle protocol 0.
  • Bugfixes for model field validation edge-cases.
  • Bugfix for authtoken migration while using a custom user model and south.

2.2.1

Date: 22nd Feb 2013

  • Security fix: Use defusedxml package to address XML parsing vulnerabilities.
  • Raw data tab added to browsable API. (Eg. Allow for JSON input.)
  • Added TimeField.
  • Serializer fields can be mapped to any method that takes no args, or only takes kwargs which have defaults.
  • Unicode support for view names/descriptions in browsable API.
  • Bugfix: request.DATA should return an empty QueryDict with no data, not None.
  • Bugfix: Remove unneeded field validation, which caused extra queries.

Security note: Following the disclosure of security vulnerabilities in Python's XML parsing libraries, use of the XMLParser class now requires the defusedxml package to be installed.

The security vulnerabilities only affect APIs which use the XMLParser class, by enabling it in any views, or by having it set in the DEFAULT_PARSER_CLASSES setting. Note that the XMLParser class is not enabled by default, so this change should affect a minority of users.

2.2.0

Date: 13th Feb 2013

  • Python 3 support.
  • Added a post_save() hook to the generic views.
  • Allow serializers to handle dicts as well as objects.
  • Deprecate ManyRelatedField() syntax in favor of RelatedField(many=True)
  • Deprecate null=True on relations in favor of required=False.
  • Deprecate blank=True on CharFields, just use required=False.
  • Deprecate optional obj argument in permissions checks in favor of has_object_permission.
  • Deprecate implicit hyperlinked relations behavior.
  • Bugfix: Fix broken DjangoModelPermissions.
  • Bugfix: Allow serializer output to be cached.
  • Bugfix: Fix styling on browsable API login.
  • Bugfix: Fix issue with deserializing empty to-many relations.
  • Bugfix: Ensure model field validation is still applied for ModelSerializer subclasses with an custom .restore_object() method.

Note: See the 2.2 announcement for full details.

2.1.x series

2.1.17

Date: 26th Jan 2013

  • Support proper 401 Unauthorized responses where appropriate, instead of always using 403 Forbidden.
  • Support json encoding of timedelta objects.
  • format_suffix_patterns() now supports include style URL patterns.
  • Bugfix: Fix issues with custom pagination serializers.
  • Bugfix: Nested serializers now accept source='*' argument.
  • Bugfix: Return proper validation errors when incorrect types supplied for relational fields.
  • Bugfix: Support nullable FKs with SlugRelatedField.
  • Bugfix: Don't call custom validation methods if the field has an error.

Note: If the primary authentication class is TokenAuthentication or BasicAuthentication, a view will now correctly return 401 responses to unauthenticated access, with an appropriate WWW-Authenticate header, instead of 403 responses.

2.1.16

Date: 14th Jan 2013

  • Deprecate django.utils.simplejson in favor of Python 2.6's built-in json module.
  • Bugfix: auto_now, auto_now_add and other editable=False fields now default to read-only.
  • Bugfix: PK fields now only default to read-only if they are an AutoField or if editable=False.
  • Bugfix: Validation errors instead of exceptions when serializers receive incorrect types.
  • Bugfix: Validation errors instead of exceptions when related fields receive incorrect types.
  • Bugfix: Handle ObjectDoesNotExist exception when serializing null reverse one-to-one

Note: Prior to 2.1.16, The Decimals would render in JSON using floating point if simplejson was installed, but otherwise render using string notation. Now that use of simplejson has been deprecated, Decimals will consistently render using string notation. See #582 for more details.

2.1.15

Date: 3rd Jan 2013

  • Added PATCH support.
  • Added RetrieveUpdateAPIView.
  • Remove unused internal save_m2m flag on ModelSerializer.save().
  • Tweak behavior of hyperlinked fields with an explicit format suffix.
  • Relation changes are now persisted in .save() instead of in .restore_object().
  • Bugfix: Fix issue with FileField raising exception instead of validation error when files=None.
  • Bugfix: Partial updates should not set default values if field is not included.

2.1.14

Date: 31st Dec 2012

  • Bugfix: ModelSerializers now include reverse FK fields on creation.
  • Bugfix: Model fields with blank=True are now required=False by default.
  • Bugfix: Nested serializers now support nullable relationships.

Note: From 2.1.14 onwards, relational fields move out of the fields.py module and into the new relations.py module, in order to separate them from regular data type fields, such as CharField and IntegerField.

This change will not affect user code, so long as it's following the recommended import style of from rest_framework import serializers and referring to fields using the style serializers.PrimaryKeyRelatedField.

2.1.13

Date: 28th Dec 2012

  • Support configurable STATICFILES_STORAGE storage.
  • Bugfix: Related fields now respect the required flag, and may be required=False.

2.1.12

Date: 21st Dec 2012

  • Bugfix: Fix bug that could occur using ChoiceField.
  • Bugfix: Fix exception in browsable API on DELETE.
  • Bugfix: Fix issue where pk was was being set to a string if set by URL kwarg.

2.1.11

Date: 17th Dec 2012

  • Bugfix: Fix issue with M2M fields in browsable API.

2.1.10

Date: 17th Dec 2012

  • Bugfix: Ensure read-only fields don't have model validation applied.
  • Bugfix: Fix hyperlinked fields in paginated results.

2.1.9

Date: 11th Dec 2012

  • Bugfix: Fix broken nested serialization.
  • Bugfix: Fix Meta.fields only working as tuple not as list.
  • Bugfix: Edge case if unnecessarily specifying required=False on read only field.

2.1.8

Date: 8th Dec 2012

  • Fix for creating nullable Foreign Keys with '' as well as None.
  • Added null=<bool> related field option.

2.1.7

Date: 7th Dec 2012

  • Serializers now properly support nullable Foreign Keys.
  • Serializer validation now includes model field validation, such as uniqueness constraints.
  • Support 'true' and 'false' string values for BooleanField.
  • Added pickle support for serialized data.
  • Support source='dotted.notation' style for nested serializers.
  • Make Request.user settable.
  • Bugfix: Fix RegexField to work with BrowsableAPIRenderer.

2.1.6

Date: 23rd Nov 2012

  • Bugfix: Unfix DjangoModelPermissions. (I am a doofus.)

2.1.5

Date: 23rd Nov 2012

  • Bugfix: Fix DjangoModelPermissions.

2.1.4

Date: 22nd Nov 2012

  • Support for partial updates with serializers.
  • Added RegexField.
  • Added SerializerMethodField.
  • Serializer performance improvements.
  • Added obtain_token_view to get tokens when using TokenAuthentication.
  • Bugfix: Django 1.5 configurable user support for TokenAuthentication.

2.1.3

Date: 16th Nov 2012

  • Added FileField and ImageField. For use with MultiPartParser.
  • Added URLField and SlugField.
  • Support for read_only_fields on ModelSerializer classes.
  • Support for clients overriding the pagination page sizes. Use the PAGINATE_BY_PARAM setting or set the paginate_by_param attribute on a generic view.
  • 201 Responses now return a 'Location' header.
  • Bugfix: Serializer fields now respect max_length.

2.1.2

Date: 9th Nov 2012

  • Filtering support.
  • Bugfix: Support creation of objects with reverse M2M relations.

2.1.1

Date: 7th Nov 2012

  • Support use of HTML exception templates. Eg. 403.html
  • Hyperlinked fields take optional slug_field, slug_url_kwarg and pk_url_kwarg arguments.
  • Bugfix: Deal with optional trailing slashes properly when generating breadcrumbs.
  • Bugfix: Make textareas same width as other fields in browsable API.
  • Private API change: .get_serializer now uses same instance and data ordering as serializer initialization.

2.1.0

Date: 5th Nov 2012

  • Serializer instance and data keyword args have their position swapped.
  • queryset argument is now optional on writable model fields.
  • Hyperlinked related fields optionally take slug_field and slug_url_kwarg arguments.
  • Support Django's cache framework.
  • Minor field improvements. (Don't stringify dicts, more robust many-pk fields.)
  • Bugfix: Support choice field in Browsable API.
  • Bugfix: Related fields with read_only=True do not require a queryset argument.

API-incompatible changes: Please read this thread regarding the instance and data keyword args before updating to 2.1.0.

2.0.x series

2.0.2

Date: 2nd Nov 2012

  • Fix issues with pk related fields in the browsable API.

2.0.1

Date: 1st Nov 2012

  • Add support for relational fields in the browsable API.
  • Added SlugRelatedField and ManySlugRelatedField.
  • If PUT creates an instance return '201 Created', instead of '200 OK'.

2.0.0

Date: 30th Oct 2012

  • Fix all of the things. (Well, almost.)
  • For more information please see the 2.0 announcement.

0.4.x series

0.4.0

  • Supports Django 1.5.
  • Fixes issues with 'HEAD' method.
  • Allow views to specify template used by TemplateRenderer
  • More consistent error responses
  • Some serializer fixes
  • Fix internet explorer ajax behavior
  • Minor xml and yaml fixes
  • Improve setup (e.g. use staticfiles, not the defunct ADMIN_MEDIA_PREFIX)
  • Sensible absolute URL generation, not using hacky set_script_prefix

0.3.x series

0.3.3

  • Added DjangoModelPermissions class to support django.contrib.auth style permissions.
  • Use staticfiles for css files.
    • Easier to override. Won't conflict with customized admin styles (e.g. grappelli)
  • Templates are now nicely namespaced.
    • Allows easier overriding.
  • Drop implied 'pk' filter if last arg in urlconf is unnamed.
    • Too magical. Explicit is better than implicit.
  • Saner template variable auto-escaping.
  • Tidier setup.py
  • Updated for URLObject 2.0
  • Bugfixes:
    • Bug with PerUserThrottling when user contains unicode chars.

0.3.2

  • Bugfixes:
    • Fix 403 for POST and PUT from the UI with UserLoggedInAuthentication (#115)
    • serialize_model method in serializer.py may cause wrong value (#73)
    • Fix Error when clicking OPTIONS button (#146)
    • And many other fixes
  • Remove short status codes
    • Zen of Python: "There should be one-- and preferably only one --obvious way to do it."
  • get_name, get_description become methods on the view - makes them overridable.
  • Improved model mixin API - Hooks for build_query, get_instance_data, get_model, get_queryset, get_ordering

0.3.1

  • [not documented]

0.3.0

  • JSONP Support
  • Bugfixes, including support for latest markdown release

0.2.x series

0.2.4

  • Fix broken IsAdminUser permission.
  • OPTIONS support.
  • XMLParser.
  • Drop mentions of Blog, BitBucket.

0.2.3

  • Fix some throttling bugs.
  • X-Throttle header on throttling.
  • Support for nesting resources on related models.

0.2.2

  • Throttling support complete.

0.2.1

  • Couple of simple bugfixes over 0.2.0

0.2.0

  • Big refactoring changes since 0.1.0, ask on the discussion group if anything isn't clear. The public API has been massively cleaned up. Expect it to be fairly stable from here on in.

  • Resource becomes decoupled into View and Resource, your views should now inherit from View, not Resource.

  • The handler functions on views .get() .put() .post() etc, no longer have the content and auth args. Use self.CONTENT inside a view to access the deserialized, validated content. Use self.user inside a view to access the authenticated user.

  • allowed_methods and anon_allowed_methods are now defunct. if a method is defined, it's available. The permissions attribute on a View is now used to provide generic permissions checking. Use permission classes such as FullAnonAccess, IsAuthenticated or IsUserOrIsAnonReadOnly to set the permissions.

  • The authenticators class becomes authentication. Class names change to Authentication.

  • The emitters class becomes renderers. Class names change to Renderers.

  • ResponseException becomes ErrorResponse.

  • The mixin classes have been nicely refactored, the basic mixins are now RequestMixin, ResponseMixin, AuthMixin, and ResourceMixin You can reuse these mixin classes individually without using the View class.

0.1.x series

0.1.1

  • Final build before pulling in all the refactoring changes for 0.2, in case anyone needs to hang on to 0.1.

0.1.0

  • Initial release.