From 5faf81e9a5e9ac0f89fa218e4f857b0bcbd12bd3 Mon Sep 17 00:00:00 2001
From: Victor Woeltjen <victor.woeltjen@nasa.gov>
Date: Sat, 6 Dec 2014 09:28:46 -0800
Subject: [PATCH] [Layout] Handle mutation edge case

Fix an edge case in the mutation capability where model
data could be lost during a mutation; this supports
auto-mutate/persist functionality for representations,
which allows Layout editing (transitioned for WTD-535)
to be persisted thereby.
---
 platform/core/src/capabilities/MutationCapability.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/platform/core/src/capabilities/MutationCapability.js b/platform/core/src/capabilities/MutationCapability.js
index 58fed4a343..d0d6c2b360 100644
--- a/platform/core/src/capabilities/MutationCapability.js
+++ b/platform/core/src/capabilities/MutationCapability.js
@@ -59,7 +59,11 @@ define(
                     // Allow mutators to change their mind by
                     // returning false.
                     if (mutationResult !== false) {
-                        copyValues(model, result);
+                        // Copy values if result was a different object
+                        // (either our clone or some other new thing)
+                        if (model !== result) {
+                            copyValues(model, result);
+                        }
                         model.modified = Date.now();
                     }