Correctly load and dump items with datetime.date(s)

Change-Id: I3fbe21df4b5ac12d13dd8633b7c362aeabbfc94f

oslo_serialization/msgpackutils.py

@@ -63,6 +63,22 @@ def _deserialize_datetime(blob):
     return dt
 
 
+def _serialize_date(d):
+    dct = {
+        'year': d.year,
+        'month': d.month,
+        'day': d.day,
+    }
+    return dumps(dct)
+
+
+def _deserialize_date(blob):
+    dct = loads(blob)
+    return datetime.date(year=dct['year'],
+                         month=dct['month'],
+                         day=dct['day'])
+
+
 def _serializer(obj):
     # Applications can assign 0 to 127 to store
     # application-specific type information...
@@ -96,6 +112,8 @@ def _serializer(obj):
     if isinstance(obj, xmlrpclib.DateTime):
         dt = datetime.datetime(*tuple(obj.timetuple())[:6])
         return msgpack.ExtType(6, _serialize_datetime(dt))
+    if isinstance(obj, datetime.date):
+        return msgpack.ExtType(7, _serialize_date(obj))
     raise TypeError("Unknown type: %r" % (obj,))
 
 
@@ -122,6 +140,8 @@ def _unserializer(code, data):
     if code == 6:
         dt = _deserialize_datetime(data)
         return xmlrpclib.DateTime(dt.timetuple())
+    if code == 7:
+        return _deserialize_date(data)
     return msgpack.ExtType(code, data)
 
 

tests/test_msgpackutils.py

@@ -75,6 +75,7 @@ class MsgPackUtilsTestMixin(test_base.BaseTestCase):
             'zzz': uuid.uuid4(),
             'yyy': 'yyy',
             'ddd': b'bbb',
+            'today': datetime.date.today(),
         }
         self.assertEqual(_dumps_loads(src), src)
 
@@ -120,6 +121,10 @@ class MsgPackUtilsTestMixin(test_base.BaseTestCase):
         thing = {'ip_addr': netaddr.IPAddress('1.2.3.4')}
         self.assertEqual(_dumps_loads(thing), thing)
 
+    def test_today(self):
+        today = datetime.date.today()
+        self.assertEqual(today, _dumps_loads(today))
+
     def test_datetime_tz_clone(self):
         eastern = timezone('US/Eastern')
         now = datetime.datetime.now()