缓存

一位女士拥有非常敏锐的意识，但几乎没有记忆……她记得足够的工作，并且努力工作。- Lydia Davis

REST Framework 中的缓存功能与 Django 中提供的缓存实用程序配合得很好。

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使用 apiview 和 viewsets 缓存

Django 提供了一个 method_decorator，用于将装饰器与基于类的视图结合使用。这可以与其他缓存装饰器结合使用，例如 cache_page、vary_on_cookie 和 vary_on_headers。

from django.utils.decorators import method_decorator
from django.views.decorators.cache import cache_page
from django.views.decorators.vary import vary_on_cookie, vary_on_headers

from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework import viewsets


class UserViewSet(viewsets.ViewSet):
    # 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):
        content = {
            "user_feed": request.user.get_user_feed(),
        }
        return Response(content)


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):
        content = {
            "title": "Post title",
            "body": "Post content",
        }
        return Response(content)

注意： cache_page 装饰器仅缓存状态为 200 的 GET 和 HEAD 响应。