From f505b2e4404a58c9d841ee96e560955eb545fede Mon Sep 17 00:00:00 2001
From: Tom Christie
Date: Tue, 12 Feb 2013 22:59:01 +0000
Subject: Clean up field_to_native logic

---
 rest_framework/fields.py | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

(limited to 'rest_framework')

diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index aa6fa3ab..327008fb 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -94,12 +94,14 @@ class Field(object):
         if self.source == '*':
             return self.to_native(obj)
 
-        if self.source:
-            value = obj
-            for component in self.source.split('.'):
-                value = get_component(value, component)
-        else:
-            value = get_component(obj, field_name)
+        source = self.source or field_name
+        value = obj
+
+        for component in source.split('.'):
+            value = get_component(value, component)
+            if value is None:
+                break
+
         return self.to_native(value)
 
     def to_native(self, value):
-- 
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