From e5bb0ee5976f2f1348387ed6ed57cc43e34caa7c Mon Sep 17 00:00:00 2001
From: LV-426 <lv-426@taproot.org.il>
Date: Sun, 9 Nov 2014 12:10:57 +0200
Subject: Topo_Diff - support omitted-argument construction

---
 src-py/model/graph.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'src-py/model/graph.py')

diff --git a/src-py/model/graph.py b/src-py/model/graph.py
index 8942285d..bc642a69 100644
--- a/src-py/model/graph.py
+++ b/src-py/model/graph.py
@@ -54,6 +54,15 @@ class Topo_Diff(object):
 
     @staticmethod
     def from_dict(topo_diff_dict):
+        """
+        construct from dict - no node/link constructor set must be provided
+        """
         ret = Topo_Diff()
-        ret.__dict__ = topo_diff_dict
+
+        # merge keys - this allows obj constructor argument ommision,
+        # such as when constructing from POST JSON data
+        for k, _ in ret.__dict__.items():
+            v =  topo_diff_dict.get(k)
+            if None != v:
+                ret.__dict__[k] = v
         return ret
-- 
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