From 94cd1369437f84adefb46462439b46dc5208ab1d Mon Sep 17 00:00:00 2001
From: Craig de Stigter <craig.destigter@koordinates.com>
Date: Thu, 29 Aug 2013 17:35:15 +1200
Subject: [PATCH] add transform_<fieldname> methods to serializers, which
 basically do the opposite of validate_<fieldname> on a per-field basis.

---
 rest_framework/serializers.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 31cfa3447..8ba1b1959 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -304,6 +304,9 @@ class BaseSerializer(WritableField):
             field.initialize(parent=self, field_name=field_name)
             key = self.get_field_key(field_name)
             value = field.field_to_native(obj, field_name)
+            method = getattr(self, 'transform_%s' % field_name, None)
+            if callable(method):
+                value = method(obj, value)
             ret[key] = value
             ret.fields[key] = field
         return ret