From 755572328830be81f4d9fbbd293e2b7ee8ff4a72 Mon Sep 17 00:00:00 2001
From: gengchc2 <geng.changcai2@zte.com.cn>
Date: Tue, 27 Sep 2016 10:51:55 +0800
Subject: [PATCH] Change __metaclass__ with optimal six.add_metaclass

Use six.add_metaclass instead of __metaclass__.[1]

[1]http://docs.openstack.org/developer/hacking/#

Change-Id: I522aa37c58aac1b4b57f356f60ed8ae9467f935b
---
 solar/dblayer/model.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/solar/dblayer/model.py b/solar/dblayer/model.py
index f93fb200..d378ebe9 100644
--- a/solar/dblayer/model.py
+++ b/solar/dblayer/model.py
@@ -21,6 +21,7 @@ import weakref
 
 from collections import defaultdict
 from random import getrandbits
+import six
 from threading import RLock
 
 from solar.dblayer.conflict_resolution import dblayer_conflict_resolver
@@ -661,10 +662,9 @@ class NestedField(FieldBase):
         obj.delete()
 
 
+@six.add_metaclass(ModelMeta)
 class NestedModel(object):
 
-    __metaclass__ = ModelMeta
-
     _nested_value = None
 
     def __init__(self, field, parent):
@@ -738,9 +738,9 @@ class NestedModelHash(object):
         self[hk] = data
 
 
+@six.add_metaclass(ModelMeta)
 class Model(object):
 
-    __metaclass__ = ModelMeta
 
     _c = ClassCache()