Deserialization issue

djorm_hstore/fields.py

@@ -4,6 +4,7 @@
 
 from . import forms, util
 import sys
+import json
 
 if sys.version_info[0] < 3:
     text_type = unicode
@@ -81,8 +82,15 @@ def get_prep_lookup(self, lookup, value):
         return value
 
     def to_python(self, value):
+        if isinstance(value, basestring):
+            return json.loads(value)
         return value or {}
 
+    def value_to_string(self, obj):
+        value = self._get_val_from_obj(obj)
+        prepped = self.get_prep_value(value)
+        return json.dumps(prepped)
+
     def _value_to_python(self, value):
         return value
 

djorm_hstore/tests/__init__.py

@@ -3,6 +3,7 @@
 from django.db import connections
 from django.db.models.aggregates import Count
 from django.utils.unittest import TestCase
+from django.core import serializers
 
 from ..functions import HstoreKeys, HstoreSlice, HstorePeek
 from ..expressions import HstoreExpression
@@ -275,6 +276,12 @@ def test_empty_querying(self):
         self.assertTrue(DataBag.objects.filter(data={}))
         self.assertTrue(DataBag.objects.where(HstoreExpression("data").contains({})))
 
+    def test_serialize_deserialize(self):
+        bag = DataBag(name='bag', data={"a": "1", "b": "2"})
+        s = serializers.serialize('json', [bag])
+        for b in serializers.deserialize('json', s):
+            self.assertEqual(b.object.data, {"a": "1", "b": "2"})
+
 
 class TestReferencesField(TestCase):
     def setUp(self):