jsonutils: encode dict keys

Currently, only the dict value are converted with to_primitive().
There's no reason not to do it on keys too to support special types.

Change-Id: I5b447f2fcd814088483f67e54261131cfc87ae79

oslo_serialization/jsonutils.py

@@ -148,7 +148,8 @@ def to_primitive(value, convert_instances=False, convert_datetime=True,
                                       level=level,
                                       max_depth=max_depth)
         if isinstance(value, dict):
-            return dict((k, recursive(v)) for k, v in six.iteritems(value))
+            return dict((recursive(k), recursive(v))
+                        for k, v in six.iteritems(value))
         elif hasattr(value, 'iteritems'):
             return recursive(dict(value.iteritems()), level=level + 1)
         elif hasattr(value, '__iter__'):

tests/test_jsonutils.py

@@ -140,6 +140,18 @@ def test_dict(self):
         self.assertEqual(jsonutils.to_primitive(dict(a=1, b=2, c=3)),
                          dict(a=1, b=2, c=3))
 
+    def test_dict_values(self):
+        self.assertEqual(
+            jsonutils.to_primitive(
+                dict(a=uuid.UUID("DD9FB2B6-CE81-4A7B-8B56-90E35D650A0B"))),
+            dict(a=u"dd9fb2b6-ce81-4a7b-8b56-90e35d650a0b"))
+
+    def test_dict_keys(self):
+        self.assertEqual(
+            jsonutils.to_primitive(
+                {uuid.UUID("DD9FB2B6-CE81-4A7B-8B56-90E35D650A0B"): 4}),
+            {u"dd9fb2b6-ce81-4a7b-8b56-90e35d650a0b": 4})
+
     def test_empty_dict(self):
         self.assertEqual(jsonutils.to_primitive({}), {})