From 253663aee8d0fe04e004daf2d77e9c33feb27b3b Mon Sep 17 00:00:00 2001
From: Alen Mujezinovic <flashingpumpkin@gmail.com>
Date: Wed, 8 Jun 2011 15:45:04 +0100
Subject: [PATCH 1/2] Added possibility to specify what attributes of
 ForeignKeys and OneToOne fields to include via nested tuples

---
 djangorestframework/resources.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/djangorestframework/resources.py b/djangorestframework/resources.py
index 36bad9149..4b81bf793 100644
--- a/djangorestframework/resources.py
+++ b/djangorestframework/resources.py
@@ -62,6 +62,12 @@ def _model_to_dict(instance, resource=None):
     
     # Method fields
     for fname in extra_fields:
+        
+        if isinstance(fname, (tuple, list)):
+            fname, fields = fname
+        else:
+            fname, fields = fname, False
+
         try:
             if hasattr(resource, fname):
                 # check the resource first, to allow it to override fields
@@ -77,7 +83,13 @@ def _model_to_dict(instance, resource=None):
     
             # TODO: It would be nicer if this didn't recurse here.
             # Let's keep _model_to_dict flat, and _object_to_data recursive.
-            data[fname] = _object_to_data(obj)
+            if fields:
+                Resource = type('Resource', (object,), {'fields': fields,
+                                                        'include': (),
+                                                        'exclude': ()})
+                data[fname] = _object_to_data(obj, Resource())
+            else:
+                data[fname] = _object_to_data(obj)
 
         except NoReverseMatch:
             # Ug, bit of a hack for now

From cf637e886b9b293e44de55b9f829b738fb286365 Mon Sep 17 00:00:00 2001
From: Alen Mujezinovic <flashingpumpkin@gmail.com>
Date: Wed, 8 Jun 2011 16:03:01 +0100
Subject: [PATCH 2/2] Nested tuples serialisation test

---
 djangorestframework/tests/resources.py | 31 +++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/djangorestframework/tests/resources.py b/djangorestframework/tests/resources.py
index fd1226be3..088e3159e 100644
--- a/djangorestframework/tests/resources.py
+++ b/djangorestframework/tests/resources.py
@@ -2,6 +2,8 @@
 from django.test import TestCase
 from djangorestframework.resources import _object_to_data
 
+from django.db import models
+
 import datetime
 import decimal
 
@@ -28,4 +30,31 @@ class TestObjectToData(TestCase):
     def test_datetime(self):
         """datetime objects are left as-is."""
         now = datetime.datetime.now()
-        self.assertEquals(_object_to_data(now), now)
\ No newline at end of file
+        self.assertEquals(_object_to_data(now), now)
+    
+    def test_tuples(self):
+        """ Test tuple serialisation """
+        class M1(models.Model):
+            field1 = models.CharField()
+            field2 = models.CharField()
+        
+        class M2(models.Model):
+            field = models.OneToOneField(M1)
+        
+        class M3(models.Model):
+            field = models.ForeignKey(M1)
+        
+        m1 = M1(field1='foo', field2='bar')
+        m2 = M2(field=m1)
+        m3 = M3(field=m1)
+        
+        Resource = type('Resource', (object,), {'fields':(), 'include':(), 'exclude':()})
+        
+        r = Resource()
+        r.fields = (('field', ('field1')),)
+
+        self.assertEqual(_object_to_data(m2, r), dict(field=dict(field1=u'foo')))
+        
+        r.fields = (('field', ('field2')),)
+        self.assertEqual(_object_to_data(m3, r), dict(field=dict(field2=u'bar')))
+