From 65b16071c480ffd5761ce9e0c1656428c339940e Mon Sep 17 00:00:00 2001
From: George Hickman <george@ghickman.co.uk>
Date: Tue, 2 Apr 2013 10:43:44 +0100
Subject: [PATCH] Get cache keys from a model or instance

---
 rest_framework/cache_lookups.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/rest_framework/cache_lookups.py b/rest_framework/cache_lookups.py
index 4d51c426e..628e3c748 100644
--- a/rest_framework/cache_lookups.py
+++ b/rest_framework/cache_lookups.py
@@ -22,7 +22,10 @@ class ETagCacheLookup(BaseCacheLookup):
 
     @staticmethod
     def get_cache_key(cls, pk):
-        class_name = cls.__class__.__name__
+        try:
+            class_name = cls.__name__  # class
+        except AttributeError:
+            class_name = cls.__class__.__name__  # instance
         return 'etag-{}-{}'.format(class_name, pk)
 
     def get_etag(self, obj):