From eb9f54c8fe9efa878093fa24a32755ad7d6fd43d Mon Sep 17 00:00:00 2001
From: Jeremy Ashkenas <jashkenas@gmail.com>
Date: Thu, 14 Oct 2010 07:36:11 -0400
Subject: [PATCH] willbailey's patch to use getByCid for internal lookups ...
 much safer.

---
 backbone.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/backbone.js b/backbone.js
index 3a029d08..bc08d58b 100644
--- a/backbone.js
+++ b/backbone.js
@@ -422,7 +422,7 @@
     // hash indexes for `id` and `cid` lookups.
     _add : function(model, options) {
       options || (options = {});
-      var already = this.get(model);
+      var already = this.getByCid(model);
       if (already) throw new Error(["Can't add the same model to a set twice", already.id]);
       this._byId[model.id] = model;
       this._byCid[model.cid] = model;
@@ -439,7 +439,7 @@
     // hash indexes for `id` and `cid` lookups.
     _remove : function(model, options) {
       options || (options = {});
-      model = this.get(model);
+      model = this.getByCid(model);
       if (!model) return null;
       delete this._byId[model.id];
       delete this._byCid[model.cid];