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170 lines
6.9 KiB
Markdown
170 lines
6.9 KiB
Markdown
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float: left;
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width: 130px;
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list-style: none;
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</style>
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# Django REST framework 3.12
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REST framework 3.12 brings a handful of refinements to the OpenAPI schema
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generation, plus support for Django's new database-agnostic `JSONField`,
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and some improvements to the `SearchFilter` class.
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## Grouping operations with tags.
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Open API schemas will now automatically include tags, based on the first element
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in the URL path.
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For example...
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Method | Path | Tags
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--------------------------------|-----------------|-------------
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`GET`, `PUT`, `PATCH`, `DELETE` | `/users/{id}/` | `['users']`
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`GET`, `POST` | `/users/` | `['users']`
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`GET`, `PUT`, `PATCH`, `DELETE` | `/orders/{id}/` | `['orders']`
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`GET`, `POST` | `/orders/` | `['orders']`
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The tags used for a particular view may also be overridden...
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```python
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class MyOrders(APIView):
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schema = AutoSchema(tags=['users', 'orders'])
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...
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```
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See [the schema documentation](https://www.django-rest-framework.org/api-guide/schemas/#grouping-operations-with-tags) for more information.
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## Customizing the operation ID.
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REST framework automatically determines operation IDs to use in OpenAPI
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schemas. The latest version provides more control for overriding the behaviour
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used to generate the operation IDs.
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See [the schema documentation](https://www.django-rest-framework.org/api-guide/schemas/#operationid) for more information.
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## Support for OpenAPI components.
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In order to output more graceful OpenAPI schemes, REST framework 3.12 now
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defines components in the schema, and then references them inside request
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and response objects. This is in contrast with the previous approach, which
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fully expanded the request and response bodies for each operation.
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The names used for a component default to using the serializer class name, [but
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may be overridden if needed](https://www.django-rest-framework.org/api-guide/schemas/#components
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)...
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```python
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class MyOrders(APIView):
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schema = AutoSchema(component_name="OrderDetails")
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```
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## More Public API
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Many methods on the `AutoSchema` class have now been promoted to public API,
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allowing you to more fully customize the schema generation. The following methods
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are now available for overriding...
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* `get_path_parameters`
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* `get_pagination_parameters`
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* `get_filter_parameters`
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* `get_request_body`
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* `get_responses`
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* `get_serializer`
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* `get_paginator`
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* `map_serializer`
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* `map_field`
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* `map_choice_field`
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* `map_field_validators`
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* `allows_filters`.
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See [the schema docs](https://www.django-rest-framework.org/api-guide/schemas/#per-view-customization)
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for details on using custom `AutoSchema` subclasses.
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## Support for JSONField.
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Django 3.1 deprecated the existing `django.contrib.postgres.fields.JSONField`
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in favour of a new database-agnositic `JSONField`.
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REST framework 3.12 now supports this new model field, and `ModelSerializer`
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classes will correctly map the model field.
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## SearchFilter improvements
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There are a couple of significant improvements to the `SearchFilter` class.
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### Nested searches against JSONField and HStoreField
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The class now supports nested search within `JSONField` and `HStoreField`, using
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the double underscore notation for traversing which element of the field the
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search should apply to.
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```python
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class SitesSearchView(generics.ListAPIView):
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"""
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An API view to return a list of archaeological sites, optionally filtered
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by a search against the site name or location. (Location searches are
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matched against the region and country names.)
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"""
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queryset = Sites.objects.all()
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serializer_class = SitesSerializer
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filter_backends = [filters.SearchFilter]
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search_fields = ['site_name', 'location__region', 'location__country']
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```
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### Searches against annotate fields
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Django allows querysets to create additional virtual fields, using the `.annotate`
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method. We now support searching against annotate fields.
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```python
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class PublisherSearchView(generics.ListAPIView):
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"""
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Search for publishers, optionally filtering the search against the average
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rating of all their books.
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"""
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queryset = Publisher.objects.annotate(avg_rating=Avg('book__rating'))
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serializer_class = PublisherSerializer
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filter_backends = [filters.SearchFilter]
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search_fields = ['avg_rating']
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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://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://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
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