From 5261b5db0e80e7e5801ad967f568fca6ce5915da Mon Sep 17 00:00:00 2001
From: Wes Cruver <chieffancypants@gmail.com>
Date: Fri, 26 Sep 2014 13:49:06 -0700
Subject: [PATCH] avoid splicing when index is undefined

---
 src/datastore/sync_methods/unlinkInverse.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/datastore/sync_methods/unlinkInverse.js b/src/datastore/sync_methods/unlinkInverse.js
index a226cc2..a0d7d88 100644
--- a/src/datastore/sync_methods/unlinkInverse.js
+++ b/src/datastore/sync_methods/unlinkInverse.js
@@ -17,7 +17,9 @@ function _unlinkInverse(definition, linked) {
                     index = i;
                   }
                 });
-                item[def.localField].splice(index, 1);
+                if (index !== undefined) {
+                  item[def.localField].splice(index, 1);
+                }
               } else if (item[def.localField] === linked) {
                 delete item[def.localField];
               }