From d9633c6817e4c4a3085398c8a52293011670ef46 Mon Sep 17 00:00:00 2001
From: Piotr Jakimiak
Date: Fri, 5 Sep 2014 11:08:34 +0200
Subject: Fix returning None when allow_none is True in CharField

---
 rest_framework/fields.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'rest_framework')

diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 9d707c9b..5955fa3f 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -475,8 +475,12 @@ class CharField(WritableField):
         if isinstance(value, six.string_types):
             return value
 
-        if value is None and not self.allow_none:
-            return ''
+        if value is None:
+            if not self.allow_none:
+                return ''
+            else:
+                # return None implicity because smart_text(None) == 'None'
+                return None
 
         return smart_text(value)
 
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