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docs: add example for caching (#7118)

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Chris Guo 2021-03-09 19:49:19 +08:00 committed by GitHub
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docs/api-guide/caching.md
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@ -13,13 +13,13 @@ provided in Django.
Django provides a [`method_decorator`][decorator] to use
decorators with class based views. This can be used with
other cache decorators such as [`cache_page`][page] and
[`vary_on_cookie`][cookie].
other cache decorators such as [`cache_page`][page],
[`vary_on_cookie`][cookie] and [`vary_on_headers`][headers].
```python
from django.utils.decorators import method_decorator
from django.views.decorators.cache import cache_page
from django.views.decorators.vary import vary_on_cookie
from django.views.decorators.vary import vary_on_cookie, vary_on_headers
from rest_framework.response import Response
from rest_framework.views import APIView
@ -27,8 +27,7 @@ from rest_framework import viewsets
class UserViewSet(viewsets.ViewSet):
# Cache requested url for each user for 2 hours
# With cookie: cache requested url for each user for 2 hours
@method_decorator(cache_page(60*60*2))
@method_decorator(vary_on_cookie)
def list(self, request, format=None):
@ -38,8 +37,18 @@ class UserViewSet(viewsets.ViewSet):
return Response(content)
class PostView(APIView):
class ProfileView(APIView):
# With auth: cache requested url for each user for 2 hours
@method_decorator(cache_page(60*60*2))
@method_decorator(vary_on_headers("Authorization",))
def get(self, request, format=None):
content = {
'user_feed': request.user.get_user_feed()
}
return Response(content)
class PostView(APIView):
# Cache page for the requested url
@method_decorator(cache_page(60*60*2))
def get(self, request, format=None):
@ -55,4 +64,5 @@ class PostView(APIView):
[page]: https://docs.djangoproject.com/en/dev/topics/cache/#the-per-view-cache
[cookie]: https://docs.djangoproject.com/en/dev/topics/http/decorators/#django.views.decorators.vary.vary_on_cookie
[headers]: https://docs.djangoproject.com/en/dev/topics/http/decorators/#django.views.decorators.vary.vary_on_headers
[decorator]: https://docs.djangoproject.com/en/dev/topics/class-based-views/intro/#decorating-the-class