From 9806feb397e61d1dae1f49f63a47df5b9731ed48 Mon Sep 17 00:00:00 2001
From: ningsuhen <ningsuhen@gmail.com>
Date: Fri, 24 Apr 2015 15:22:50 +0530
Subject: [PATCH] Fix for bug -
 https://github.com/strongloop/loopback-datasource-juggler/issues/571

---
 lib/relation-definition.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/relation-definition.js b/lib/relation-definition.js
index c6596d55..a4b4e506 100644
--- a/lib/relation-definition.js
+++ b/lib/relation-definition.js
@@ -865,7 +865,13 @@ var throughKeys = function(definition) {
       var fk2 = definition.keyThrough;
     }
   } else if (definition.modelFrom === definition.modelTo) {
-    return findBelongsTo(modelThrough, definition.modelTo, pk2);
+    return findBelongsTo(modelThrough, definition.modelTo, pk2).
+      sort(function (fk1, fk2) {
+        //Fix for bug - https://github.com/strongloop/loopback-datasource-juggler/issues/571
+        //Make sure that first key is mapped to modelFrom
+        //& second key to modelTo. Order matters
+      return (definition.keyTo === fk1) ? -1 : 1;
+    });
   } else {
     var fk1 = findBelongsTo(modelThrough, definition.modelFrom,
                             definition.keyFrom)[0];