From 4d433b6513d4a968c2b5b87a5dfe76f6f33cd34c Mon Sep 17 00:00:00 2001
From: Catstyle <Catstyle.Lee@gmail.com>
Date: Tue, 9 Dec 2014 18:56:52 +0800
Subject: [PATCH] check instance __getitem__ value first

---
 rest_framework/fields.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 0c6c2d390..8aec5c2b2 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -59,15 +59,17 @@ def get_attribute(instance, attrs):
         if instance is None:
             # Break out early if we get `None` at any point in a nested lookup.
             return None
+        if getattr(instance, '__getitem__', None):
+            try:
+                return instance[attr]
+            except (KeyError, TypeError, AttributeError):
+                pass
         try:
             instance = getattr(instance, attr)
         except ObjectDoesNotExist:
             return None
         except AttributeError as exc:
-            try:
-                return instance[attr]
-            except (KeyError, TypeError, AttributeError):
-                raise exc
+            raise exc
         if is_simple_callable(instance):
             instance = instance()
     return instance