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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.

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

3.0.x series

3.0.2

Date: 17th December 2014.

Ensure request.user is made available to response middleware. (#2155)
Client.logout() also cancels any existing force_authenticate. (#2218, #2259)
Extra assertions and better checks to preventing incorrect serializer API use. (#2228, #2234, #2262, #2263, #2266, #2267, #2289, #2291)
Fixed min_length message for CharField. (#2255)
Fix UnicodeDecodeError, which can occur on serializer repr. (#2270, #2279)
Fix empty HTML values when a default is provided. (#2280, #2294)
Fix SlugRelatedField raising UnicodeEncodeError when used as a multiple choice input. (#2290)

3.0.1

Date: 11th December 2014.

More helpful error message when the default Serializer create() fails. (#2013)
Raise error when attempting to save serializer if data is not valid. (#2098)
Fix FileUploadParser breaks with empty file names and multiple upload handlers. (#2109)
Improve BindingDict to support standard dict-functions. (#2135, #2163)
Add validate() to ListSerializer. (#2168, #2225, #2232)
Fix JSONP renderer failing to escape some characters. (#2169, #2195)
Add missing default style for FileField. (#2172)
Actions are required when calling ViewSet.as_view(). (#2175)
Add allow_blank to ChoiceField. (#2184, #2239)
Cosmetic fixes in the HTML renderer. (#2187)
Raise error if fields on serializer is not a list of strings. (#2193, #2213)
Improve checks for nested creates and updates. (#2194, #2196)
validated_attrs argument renamed to validated_data in Serializer create()/update(). (#2197)
Remove deprecated code to reflect the dropped Django versions. (#2200)
Better serializer errors for nested writes. (#2202, #2215)
Fix pagination and custom permissions incompatibility. (#2205)
Raise error if fields on serializer is not a list of strings. (#2213)
Add missing translation markers for relational fields. (#2231)
Improve field lookup behavior for dicts/mappings. (#2244, #2243)
Optimized hyperlinked PK. (#2242)

3.0.0

Date: 1st December 2014

For full details see the 3.0 release announcement.

2.4.x series

2.4.4

Date: 3rd November 2014.

Security fix: Escape URLs when replacing format= query parameter, as used in dropdown on GET button in browsable API to allow explicit selection of JSON vs HTML output.
Maintain ordering of URLs in API root view for DefaultRouter.
Fix follow=True in APIRequestFactory
Resolve issue with invalid read_only=True, required=True fields being automatically generated by ModelSerializer in some cases.
Resolve issue with OPTIONS requests returning incorrect information for views using get_serializer_class to dynamically determine serializer based on request method.

2.4.3

Date: 19th September 2014.

Support translatable view docstrings being displayed in the browsable API.
Support encoded filename* in raw file uploads with FileUploadParser.
Allow routers to support viewsets that don't include any list routes or that don't include any detail routes.
Don't render an empty login control in browsable API if login view is not included.
CSRF exemption performed in .as_view() to prevent accidental omission if overriding .dispatch().
Login on browsable API now displays validation errors.
Bugfix: Fix migration in authtoken application.
Bugfix: Allow selection of integer keys in nested choices.
Bugfix: Return None instead of 'None' in CharField with allow_none=True.
Bugfix: Ensure custom model fields map to equivelent serializer fields more reliably.
Bugfix: DjangoFilterBackend no longer quietly changes queryset ordering.

2.4.2

Date: 3rd September 2014.

Bugfix: Fix broken pagination for 2.4.x series.

2.4.1

Date: 1st September 2014.

Bugfix: Fix broken login template for browsable API.

2.4.0

Date: 29th August 2014.

Django version requirements: The lowest supported version of Django is now 1.4.2.

South version requirements: This note applies to any users using the optional authtoken application, which includes an associated database migration. You must now either upgrade your south package to version 1.0, or instead use the built-in migration support available with Django 1.7.

Added compatibility with Django 1.7's database migration support.
New test runner, using py.test.
Deprecated .model view attribute in favor of explicit .queryset and .serializer_class attributes. The DEFAULT_MODEL_SERIALIZER_CLASS setting is also deprecated.
@detail_route and @list_route decorators replace @action and @link.
Support customizable view name and description functions, using the VIEW_NAME_FUNCTION and VIEW_DESCRIPTION_FUNCTION settings.
Added NUM_PROXIES setting for smarter client IP identification.
Added MAX_PAGINATE_BY setting and max_paginate_by generic view attribute.
Added Retry-After header to throttled responses, as per RFC 6585. This should now be used in preference to the custom X-Trottle-Wait-Seconds header which will be fully deprecated in 3.0.
Added cache attribute to throttles to allow overriding of default cache.
Added lookup_value_regex attribute to routers, to allow the URL argument matching to be constrainted by the user.
Added allow_none option to CharField.
Support Django's standard status_code class attribute on responses.
More intuitive behavior on the test client, as client.logout() now also removes any credentials that have been set.
Bugfix: ?page_size=0 query parameter now falls back to default page size for view, instead of always turning pagination off.
Bugfix: Always uppercase X-Http-Method-Override methods.
Bugfix: Copy filter_backends list before returning it, in order to prevent view code from mutating the class attribute itself.
Bugfix: Set the .action attribute on viewsets when introspected by OPTIONS for testing permissions on the view.
Bugfix: Ensure ValueError raised during deserialization results in a error list rather than a single error. This is now consistent with other validation errors.
Bugfix: Fix cache_format typo on throttle classes, was "throtte_%(scope)s_%(ident)s". Note that this will invalidate existing throttle caches.

2.3.x series

2.3.14

Date: 12th June 2014

Security fix: Escape request path when it is include as part of the login and logout links in the browsable API.
help_text and verbose_name automatically set for related fields on ModelSerializer.
Fix nested serializers linked through a backward foreign key relation.
Fix bad links for the BrowsableAPIRenderer with YAMLRenderer.
Add UnicodeYAMLRenderer that extends YAMLRenderer with unicode.
Fix parse_header argument convertion.
Fix mediatype detection under Python 3.
Web browsable API now offers blank option on dropdown when the field is not required.
APIException representation improved for logging purposes.
Allow source="*" within nested serializers.
Better support for custom oauth2 provider backends.
Fix field validation if it's optional and has no value.
Add SEARCH_PARAM and ORDERING_PARAM.
Fix APIRequestFactory to support arguments within the url string for GET.
Allow three transport modes for access tokens when accessing a protected resource.
Fix QueryDict encoding on request objects.
Ensure throttle keys do not contain spaces, as those are invalid if using memcached.
Support blank_display_value on ChoiceField.

2.3.13

Date: 6th March 2014

Django 1.7 Support.
Fix default argument when used with serializer relation fields.
Display the media type of the content that is being displayed in the browsable API, rather than 'text/html'.
Bugfix for urlize template failure when URL regex is matched, but value does not urlparse.
Use urandom for token generation.
Only use Vary: Accept when more than one renderer exists.

2.3.12

Date: 15th January 2014

Security fix: OrderingField now only allows ordering on readable serializer fields, or on fields explicitly specified using ordering_fields. This prevents users being able to order by fields that are not visible in the API, and exploiting the ordering of sensitive data such as password hashes.
Bugfix: write_only = True fields now display in the browsable API.

2.3.11

Date: 14th January 2014

Added write_only serializer field argument.
Added write_only_fields option to ModelSerializer classes.
JSON renderer now deals with objects that implement a dict-like interface.
Fix compatiblity with newer versions of django-oauth-plus.
Bugfix: Refine behavior that calls model manager all() across nested serializer relationships, preventing erronous behavior with some non-ORM objects, and preventing unnecessary queryset re-evaluations.
Bugfix: Allow defaults on BooleanFields to be properly honored when values are not supplied.
Bugfix: Prevent double-escaping of non-latin1 URL query params when appending format=json params.

2.3.10

Date: 6th December 2013

Add in choices information for ChoiceFields in response to OPTIONS requests.
Added pre_delete() and post_delete() method hooks.
Added status code category helper functions.
Bugfix: Partial updates which erronously set a related field to None now correctly fail validation instead of raising an exception.
Bugfix: Responses without any content no longer include an HTTP 'Content-Type' header.
Bugfix: Correctly handle validation errors in PUT-as-create case, responding with 400.

2.3.9

Date: 15th November 2013

Fix Django 1.6 exception API compatibility issue caused by ValidationError.
Include errors in HTML forms in browsable API.
Added JSON renderer support for numpy scalars.
Added transform_<fieldname> hooks on serializers for easily modifying field output.
Added get_context hook in BrowsableAPIRenderer.
Allow serializers to be passed files but no data.
HTMLFormRenderer now renders serializers directly to HTML without needing to create an intermediate form object.
Added get_filter_backends hook.
Added queryset aggregates to allowed fields in OrderingFilter.
Bugfix: Fix decimal suppoprt with YAMLRenderer.
Bugfix: Fix submission of unicode in browsable API through raw data form.

2.3.8

Date: 11th September 2013

Added DjangoObjectPermissions, and DjangoObjectPermissionsFilter.
Support customizable exception handling, using the EXCEPTION_HANDLER setting.
Support customizable view name and description functions, using the VIEW_NAME_FUNCTION and VIEW_DESCRIPTION_FUNCTION settings.
Added MAX_PAGINATE_BY setting and max_paginate_by generic view attribute.
Added cache attribute to throttles to allow overriding of default cache.
'Raw data' tab in browsable API now contains pre-populated data.
'Raw data' and 'HTML form' tab preference in browsable API now saved between page views.
Bugfix: required=True argument fixed for boolean serializer fields.
Bugfix: client.force_authenticate(None) should also clear session info if it exists.
Bugfix: Client sending empty string instead of file now clears FileField.
Bugfix: Empty values on ChoiceFields with required=False now consistently return None.
Bugfix: Clients setting page_size=0 now simply returns the default page size, instead of disabling pagination. [*]

[*] Note that the change in page_size=0 behaviour fixes what is considered to be a bug in how clients can effect the pagination size. However if you were relying on this behavior you will need to add the following mixin to your list views in order to preserve the existing behavior.

class DisablePaginationMixin(object):
    def get_paginate_by(self, queryset=None):
        if self.request.QUERY_PARAMS[self.paginate_by_param] == '0':
            return None
        return super(DisablePaginationMixin, self).get_paginate_by(queryset)

2.3.7

Date: 16th August 2013

Added APITestClient, APIRequestFactory and APITestCase etc...
Refactor SessionAuthentication to allow esier override for CSRF exemption.
Remove 'Hold down "Control" message from help_text' widget messaging when not appropriate.
Added admin configuration for auth tokens.
Bugfix: AnonRateThrottle fixed to not throttle authenticated users.
Bugfix: Don't set X-Throttle-Wait-Seconds when throttle does not have wait value.
Bugfix: Fixed PATCH button title in browsable API.
Bugfix: Fix issue with OAuth2 provider naive datetimes.

2.3.6

Date: 27th June 2013

Added trailing_slash option to routers.
Include support for HttpStreamingResponse.
Support wider range of default serializer validation when used with custom model fields.
UTF-8 Support for browsable API descriptions.
OAuth2 provider uses timezone aware datetimes when supported.
Bugfix: Return error correctly when OAuth non-existent consumer occurs.
Bugfix: Allow FileUploadParser to correctly filename if provided as URL kwarg.
Bugfix: Fix ScopedRateThrottle.

2.3.5

Date: 3rd June 2013

Added get_url hook to HyperlinkedIdentityField.
Serializer field default argument may be a callable.
@action decorator now accepts a methods argument.
Bugfix: request.user should be still be accessible in renderer context if authentication fails.
Bugfix: The lookup_field option on HyperlinkedIdentityField should apply by default to the url field on the serializer.
Bugfix: HyperlinkedIdentityField should continue to support pk_url_kwarg, slug_url_kwarg, slug_field, in a pending deprecation state.
Bugfix: Ensure we always return 404 instead of 500 if a lookup field cannot be converted to the correct lookup type. (Eg non-numeric AutoInteger pk lookup)

2.3.4

Date: 24th May 2013

Serializer fields now support label and help_text.
Added UnicodeJSONRenderer.
OPTIONS requests now return metadata about fields for POST and PUT requests.
Bugfix: charset now properly included in Content-Type of responses.
Bugfix: Blank choice now added in browsable API on nullable relationships.
Bugfix: Many to many relationships with through tables are now read-only.
Bugfix: Serializer fields now respect model field args such as max_length.
Bugfix: SlugField now performs slug validation.
Bugfix: Lazy-translatable strings now properly serialized.
Bugfix: Browsable API now supports bootswatch styles properly.
Bugfix: HyperlinkedIdentityField now uses lookup_field kwarg.

Note: Responses now correctly include an appropriate charset on the Content-Type header. For example: application/json; charset=utf-8. If you have tests that check the content type of responses, you may need to update these accordingly.

2.3.3

Date: 16th May 2013

Added SearchFilter
Added OrderingFilter
Added GenericViewSet
Bugfix: Multiple @action and @link methods now allowed on viewsets.
Bugfix: Fix API Root view issue with DjangoModelPermissions

2.3.2

Date: 8th May 2013

Bugfix: Fix TIME_FORMAT, DATETIME_FORMAT and DATE_FORMAT settings.
Bugfix: Fix DjangoFilterBackend issue, failing when used on view with queryset attribute.

2.3.1

Date: 7th May 2013

Bugfix: Fix breadcrumb rendering issue.

2.3.0

Date: 7th May 2013

ViewSets and Routers.
ModelSerializers support reverse relations in 'fields' option.
HyperLinkedModelSerializers support 'id' field in 'fields' option.
Cleaner generic views.
Support for multiple filter classes.
FileUploadParser support for raw file uploads.
DecimalField support.
Made Login template easier to restyle.
Bugfix: Fix issue with depth>1 on ModelSerializer.

Note: See the 2.3 announcement for full details.

2.2.x series

2.2.7

Date: 17th April 2013

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

2.2.6

Date: 4th April 2013

OAuth2 authentication no longer requires unnecessary 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 ticket 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