From abc9b98344a2101abe116078ccc0c3178c695491 Mon Sep 17 00:00:00 2001
From: Henry Clifford <h.a.clifford@gmail.com>
Date: Wed, 5 Jun 2013 17:26:46 -0400
Subject: [PATCH] Add property_fields for marking fields as model properties

---
 rest_framework/serializers.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 11ead02e4..0ca8769ed 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -546,6 +546,7 @@ class ModelSerializerOptions(SerializerOptions):
         super(ModelSerializerOptions, self).__init__(meta)
         self.model = getattr(meta, 'model', None)
         self.read_only_fields = getattr(meta, 'read_only_fields', ())
+        self.property_fields = getattr(meta, 'property_fields', ())
 
 
 class ModelSerializer(Serializer):
@@ -693,6 +694,10 @@ class ModelSerializer(Serializer):
                 (self.__class__.__name__, field_name)
             ret[field_name].read_only = True
 
+        # For each of the `property_fields` construct a field
+        for property_name in self.opts.property_fields:
+            ret[property_name] = self.get_property_field(property_name) 
+
         return ret
 
     def get_pk_field(self, model_field):
@@ -733,6 +738,9 @@ class ModelSerializer(Serializer):
 
         return PrimaryKeyRelatedField(**kwargs)
 
+    def get_property_field(self, model_property):
+        return CharField(read_only=True, source=model_property)
+
     def get_field(self, model_field):
         """
         Creates a default instance of a basic non-relational field.