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<h1 id="caching"><a class="toclink" href="#caching">Caching</a></h1>
<blockquote>
<p>A certain woman had a very sharp consciousness but almost no
memory ... She remembered enough to work, and she worked hard.
- Lydia Davis</p>
</blockquote>
<p>Caching in REST Framework works well with the cache utilities
provided in Django.</p>
<hr />
<h2 id="using-cache-with-apiview-and-viewsets"><a class="toclink" href="#using-cache-with-apiview-and-viewsets">Using cache with apiview and viewsets</a></h2>
<p>Django provides a <a href="https://docs.djangoproject.com/en/dev/topics/class-based-views/intro/#decorating-the-class"><code>method_decorator</code></a> to use
decorators with class based views. This can be used with
other cache decorators such as <a href="https://docs.djangoproject.com/en/dev/topics/cache/#the-per-view-cache"><code>cache_page</code></a> and
<a href="https://docs.djangoproject.com/en/dev/topics/http/decorators/#django.views.decorators.vary.vary_on_cookie"><code>vary_on_cookie</code></a>.</p>
<pre><code class="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 rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework import viewsets
class UserViewSet(viewsets.ViewSet):
# 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 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)
</code></pre>
<p><strong>NOTE:</strong> The <a href="https://docs.djangoproject.com/en/dev/topics/cache/#the-per-view-cache"><code>cache_page</code></a> decorator only caches the
<code>GET</code> and <code>HEAD</code> responses with status 200.</p>
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