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< a href = "#django-rest-framework-311" > Django REST framework 3.11< / a >
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< a href = "#openapi-schema-generation-improvements" > OpenAPI Schema Generation Improvements< / a >
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< h1 id = "django-rest-framework-311" > < a class = "toclink" href = "#django-rest-framework-311" > Django REST framework 3.11< / a > < / h1 >
< p > The 3.11 release adds support for Django 3.0.< / p >
< ul >
< li > Our supported Python versions are now: 3.5, 3.6, 3.7, and 3.8.< / li >
< li > Our supported Django versions are now: 1.11, 2.0, 2.1, 2.2, and 3.0.< / li >
< / ul >
< p > This release will be the last to support Python 3.5 or Django 1.11.< / p >
< h2 id = "openapi-schema-generation-improvements" > < a class = "toclink" href = "#openapi-schema-generation-improvements" > OpenAPI Schema Generation Improvements< / a > < / h2 >
< p > The OpenAPI schema generation continues to mature. Some highlights in 3.11
include:< / p >
< ul >
< li > Automatic mapping of Django REST Framework renderers and parsers into OpenAPI
request and response media-types.< / li >
< li > Improved mapping JSON schema mapping types, for example in HStoreFields, and
with large integer values.< / li >
< li > Porting of the old CoreAPI parsing of docstrings to form OpenAPI operation
descriptions.< / li >
< / ul >
< p > In this example view operation descriptions for the < code > get< / code > and < code > post< / code > methods will
be extracted from the class docstring:< / p >
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< pre > < code class = "language-python" > class DocStringExampleListView(APIView):
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" " "
get: A description of my GET operation.
post: A description of my POST operation.
" " "
permission_classes = [permissions.IsAuthenticatedOrReadOnly]
def get(self, request, *args, **kwargs):
...
def post(self, request, *args, **kwargs):
...
< / code > < / pre >
< h2 id = "validator-default-context" > < a class = "toclink" href = "#validator-default-context" > Validator / Default Context< / a > < / h2 >
< p > In some circumstances a Validator class or a Default class may need to access the serializer field with which it is called, or the < code > .context< / code > with which the serializer was instantiated. In particular:< / p >
< ul >
< li > 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.< / li >
< li > The < code > CurrentUserDefault< / code > needs to be able to determine the context with which the serializer was instantiated, in order to return the current user instance.< / li >
< / ul >
< p > Previous our approach to this was that implementations could include a < code > set_context< / code > 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.< / p >
< p > Instead, validators or defaults which require the serializer context, should include a < code > requires_context = True< / code > attribute on the class.< / p >
< p > The < code > __call__< / code > method should then include an additional < code > serializer_field< / code > argument.< / p >
< p > Validator implementations will look like this:< / p >
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< pre > < code class = "language-python" > class CustomValidator:
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requires_context = True
def __call__(self, value, serializer_field):
...
< / code > < / pre >
< p > Default implementations will look like this:< / p >
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< pre > < code class = "language-python" > class CustomDefault:
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requires_context = True
def __call__(self, serializer_field):
...
< / code > < / pre >
< hr / >
< h2 id = "funding" > < a class = "toclink" href = "#funding" > Funding< / a > < / h2 >
< p > REST framework is a < em > collaboratively funded project< / em > . If you use
REST framework commercially we strongly encourage you to invest in its
continued development by < strong > < a href = "../funding/" > signing up for a paid plan< / a > < / strong > .< / p >
< p > < em > Every single sign-up helps us make REST framework long-term financially sustainable.< / em > < / p >
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< p > < em > Many thanks to all our < a href = "https://fund.django-rest-framework.org/topics/funding/#our-sponsors" > wonderful sponsors< / a > , and in particular to our premium backers, < a href = "https://getsentry.com/welcome/" > Sentry< / a > , < a href = "https://getstream.io/?utm_source=drf&utm_medium=banner&utm_campaign=drf" > Stream< / a > , < a href = "https://software.esg-usa.com/" > ESG< / a > , < a href = "https://rollbar.com/?utm_source=django&utm_medium=sponsorship&utm_campaign=freetrial" > Rollbar< / a > , < a href = "https://cadre.com" > Cadre< / a > , < a href = "https://hubs.ly/H0f30Lf0" > Kloudless< / a > , < a href = "https://lightsonsoftware.com" > Lights On Software< / a > , and < a href = "https://retool.com/?utm_source=djangorest&utm_medium=sponsorship" > Retool< / a > .< / em > < / p >
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