From 3b3e3983e9f66d70c9c2232c2700e41c6a840314 Mon Sep 17 00:00:00 2001
From: Alex <gavinxyang@gmail.com>
Date: Wed, 22 Mar 2017 23:04:04 -0700
Subject: [PATCH] add none check for user

If user never sign in, or there is no user in request. It throw exception.
---
 rest_framework/compat.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rest_framework/compat.py b/rest_framework/compat.py
index 45ac49841..3835095e9 100644
--- a/rest_framework/compat.py
+++ b/rest_framework/compat.py
@@ -128,6 +128,8 @@ def _resolve_model(obj):
 
 
 def is_authenticated(user):
+    if not user:
+      return False
     if django.VERSION < (1, 10):
         return user.is_authenticated()
     return user.is_authenticated