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Version 3.11 (#7083)
* Version 3.11 * Added notes on OpenAPI changes for 3.11. * Minor docs tweaking * Update package version and supported versions * Use a lazy import for django.test.client.encode_mutlipart. Closes #7078
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Diff for: ‎README.md

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# Requirements
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* Python (3.5, 3.6, 3.7)
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* Django (1.11, 2.0, 2.1, 2.2)
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* Python (3.5, 3.6, 3.7, 3.8)
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* Django (1.11, 2.0, 2.1, 2.2, 3.0)
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We **highly recommend** and only officially support the latest patch release of
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each Python and Django series.

Diff for: ‎docs/community/3.10-announcement.md

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[legacy-core-api-docs]:https://github.com/encode/django-rest-framework/blob/master/docs/coreapi/index.md
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[sponsors]: https://fund.django-rest-framework.org/topics/funding/#our-sponsors
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[funding]: community/funding.md
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[funding]: funding.md

Diff for: ‎docs/community/3.11-announcement.md

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<style>
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.promo li a {
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float: left;
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width: 130px;
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height: 20px;
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text-align: center;
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margin: 10px 30px;
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padding: 150px 0 0 0;
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background-position: 0 50%;
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background-size: 130px auto;
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background-repeat: no-repeat;
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font-size: 120%;
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color: black;
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}
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.promo li {
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list-style: none;
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}
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</style>
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# Django REST framework 3.11
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The 3.11 release adds support for Django 3.0.
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* Our supported Python versions are now: 3.5, 3.6, 3.7, and 3.8.
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* Our supported Django versions are now: 1.11, 2.0, 2.1, 2.2, and 3.0.
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This release will be the last to support Python 3.5 or Django 1.11.
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## OpenAPI Schema Generation Improvements
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The OpenAPI schema generation continues to mature. Some highlights in 3.11
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include:
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* Automatic mapping of Django REST Framework renderers and parsers into OpenAPI
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request and response media-types.
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* Improved mapping JSON schema mapping types, for example in HStoreFields, and
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with large integer values.
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* Porting of the old CoreAPI parsing of docstrings to form OpenAPI operation
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descriptions.
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In this example view operation descriptions for the `get` and `post` methods will
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be extracted from the class docstring:
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```python
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class DocStringExampleListView(APIView):
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"""
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get: A description of my GET operation.
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post: A description of my POST operation.
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"""
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permission_classes = [permissions.IsAuthenticatedOrReadOnly]
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def get(self, request, *args, **kwargs):
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...
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def post(self, request, *args, **kwargs):
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...
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```
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## Validator / Default Context
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In some circumstances a Validator class or a Default class may need to access the serializer field with which it is called, or the `.context` with which the serializer was instantiated. In particular:
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* Uniqueness validators need to be able to determine the name of the field to which they are applied, in order to run an appropriate database query.
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* The `CurrentUserDefault` needs to be able to determine the context with which the serializer was instantiated, in order to return the current user instance.
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Previous our approach to this was that implementations could include a `set_context` method, which would be called prior to validation. However this approach had issues with potential race conditions. We have now move this approach into a pending deprecation state. It will continue to function, but will be escalated to a deprecated state in 3.12, and removed entirely in 3.13.
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Instead, validators or defaults which require the serializer context, should include a `requires_context = True` attribute on the class.
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The `__call__` method should then include an additional `serializer_field` argument.
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Validator implementations will look like this:
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```python
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class CustomValidator:
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requires_context = True
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def __call__(self, value, serializer_field):
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...
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```
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Default implementations will look like this:
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```python
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class CustomDefault:
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requires_context = True
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def __call__(self, serializer_field):
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...
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```
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---
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## Funding
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REST framework is a *collaboratively funded project*. If you use
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REST framework commercially we strongly encourage you to invest in its
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continued development by **[signing up for a paid plan][funding]**.
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*Every single sign-up helps us make REST framework long-term financially sustainable.*
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<ul class="premium-promo promo">
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<li><a href="https://getsentry.com/welcome/" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/sentry130.png)">Sentry</a></li>
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<li><a href="https://getstream.io/try-the-api/?utm_source=drf&utm_medium=banner&utm_campaign=drf" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/stream-130.png)">Stream</a></li>
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<li><a href="https://software.esg-usa.com" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/esg-new-logo.png)">ESG</a></li>
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<li><a href="https://rollbar.com" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/rollbar2.png)">Rollbar</a></li>
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<li><a href="https://cadre.com" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/cadre.png)">Cadre</a></li>
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<li><a href="https://hubs.ly/H0f30Lf0" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/kloudless-plus-text.png)">Kloudless</a></li>
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<li><a href="https://lightsonsoftware.com" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/lightson-dark.png)">Lights On Software</a></li>
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<li><a href="https://retool.com/?utm_source=djangorest&utm_medium=sponsorship" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/retool-sidebar.png)">Retool</a></li>
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</ul>
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<div style="clear: both; padding-bottom: 20px;"></div>
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*Many thanks to all our [wonderful sponsors][sponsors], and in particular to our premium backers, [Sentry](https://getsentry.com/welcome/), [Stream](https://getstream.io/?utm_source=drf&utm_medium=banner&utm_campaign=drf), [ESG](https://software.esg-usa.com/), [Rollbar](https://rollbar.com/?utm_source=django&utm_medium=sponsorship&utm_campaign=freetrial), [Cadre](https://cadre.com), [Kloudless](https://hubs.ly/H0f30Lf0), [Lights On Software](https://lightsonsoftware.com), and [Retool](https://retool.com/?utm_source=djangorest&utm_medium=sponsorship).*
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[sponsors]: https://fund.django-rest-framework.org/topics/funding/#our-sponsors
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[funding]: funding.md

Diff for: ‎docs/index.md

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* [Authentication policies][authentication] including packages for [OAuth1a][oauth1-section] and [OAuth2][oauth2-section].
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* [Serialization][serializers] that supports both [ORM][modelserializer-section] and [non-ORM][serializer-section] data sources.
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* Customizable all the way down - just use [regular function-based views][functionview-section] if you don't need the [more][generic-views] [powerful][viewsets] [features][routers].
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* [Extensive documentation][index], and [great community support][group].
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* Extensive documentation, and [great community support][group].
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* Used and trusted by internationally recognised companies including [Mozilla][mozilla], [Red Hat][redhat], [Heroku][heroku], and [Eventbrite][eventbrite].
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REST framework requires the following:
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* Python (3.5, 3.6, 3.7)
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* Django (1.11, 2.0, 2.1, 2.2)
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* Python (3.5, 3.6, 3.7, 3.8)
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* Django (1.11, 2.0, 2.1, 2.2, 3.0)
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We **highly recommend** and only officially support the latest patch release of
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each Python and Django series.

Diff for: ‎mkdocs.yml

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- 'Contributing to REST framework': 'community/contributing.md'
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- 'Project management': 'community/project-management.md'
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- 'Release Notes': 'community/release-notes.md'
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- '3.11 Announcement': 'community/3.11-announcement.md'
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- '3.10 Announcement': 'community/3.10-announcement.md'
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- '3.9 Announcement': 'community/3.9-announcement.md'
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- '3.8 Announcement': 'community/3.8-announcement.md'

Diff for: ‎rest_framework/__init__.py

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"""
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__title__ = 'Django REST framework'
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__version__ = '3.10.3'
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__version__ = '3.11.0'
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__author__ = 'Tom Christie'
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__license__ = 'BSD 3-Clause'
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__copyright__ = 'Copyright 2011-2019 Encode OSS Ltd'

Diff for: ‎rest_framework/renderers.py

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from django.core.paginator import Page
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from django.http.multipartparser import parse_header
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from django.template import engines, loader
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from django.test.client import encode_multipart
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from django.urls import NoReverseMatch
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from django.utils.html import mark_safe
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def render(self, data, accepted_media_type=None, renderer_context=None):
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