jsonutils: support UUID encoding

Change-Id: I2c864f793b4ee6136442b678380bf21f732be643

oslo_serialization/jsonutils.py

@@ -37,6 +37,7 @@ import functools
 import inspect
 import itertools
 import sys
+import uuid
 
 is_simplejson = False
 if sys.version_info < (2, 7):
@@ -111,6 +112,9 @@ def to_primitive(value, convert_instances=False, convert_datetime=True,
         else:
             return value
 
+    if isinstance(value, uuid.UUID):
+        return six.text_type(value)
+
     # value of itertools.count doesn't get caught by nasty_type_tests
     # and results in infinite loop when list(value) is called.
     if type(value) == itertools.count:

tests/test_jsonutils.py

@@ -16,6 +16,7 @@
 import collections
 import datetime
 import json
+import uuid
 
 import mock
 import netaddr
@@ -68,6 +69,11 @@ class JSONUtilsTestMixin(object):
 
         self.assertEqual(expected, fp.getvalue())
 
+    def test_dumps_uuid(self):
+        self.assertEqual('"87edfaf4-9bff-11e4-82bd-b7b4e88d3780"',
+                         jsonutils.dumps(
+                             uuid.UUID("87edfaf49bff11e482bdb7b4e88d3780")))
+
     def test_loads(self):
         self.assertEqual({'a': 'b'}, jsonutils.loads('{"a": "b"}'))
 
@@ -135,6 +141,11 @@ class ToPrimitiveTestCase(test_base.BaseTestCase):
         self.assertEqual(jsonutils.to_primitive(x),
                          '1920-02-03T04:05:06.000007')
 
+    def test_uuid(self):
+        x = uuid.uuid4()
+        self.assertEqual(jsonutils.to_primitive(x),
+                         six.text_type(x))
+
     def test_datetime_preserve(self):
         x = datetime.datetime(1920, 2, 3, 4, 5, 6, 7)
         self.assertEqual(jsonutils.to_primitive(x, convert_datetime=False), x)