From c4d7b10e5cca4c0eeba3244353173d973d3bb031 Mon Sep 17 00:00:00 2001
From: Guoshuai Li <ligs@dtdream.com>
Date: Tue, 2 May 2017 18:38:36 +0800
Subject: [PATCH] Fix the object is unhashable when inheriting the class
 "ComparableVersionedObject"

In python3, A class that overrides __eq__() and does not define
"__hash__()" will have its __hash__() implicitly set to None.
This will cause the set method to unhashable failed.
https://docs.python.org/3/reference/datamodel.html#object.__hash__

Change-Id: I21685303e9bd233241b7b4216e3feb7bdaecc0a4
Closes-Bug: #1687592
---
 oslo_versionedobjects/base.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/oslo_versionedobjects/base.py b/oslo_versionedobjects/base.py
index 7df5e52..6881193 100644
--- a/oslo_versionedobjects/base.py
+++ b/oslo_versionedobjects/base.py
@@ -706,6 +706,9 @@ class ComparableVersionedObject(object):
             return self.obj_to_primitive() == obj.obj_to_primitive()
         return NotImplemented
 
+    def __hash__(self):
+        return super(ComparableVersionedObject, self).__hash__()
+
     def __ne__(self, obj):
         if hasattr(obj, 'obj_to_primitive'):
             return self.obj_to_primitive() != obj.obj_to_primitive()
-- 
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