From 3a0f0d4d5d268fda620c24e7844c9a9d069edca8 Mon Sep 17 00:00:00 2001
From: Sibelius Seraphini <sibeliusseraphini@gmail.com>
Date: Tue, 18 Dec 2018 11:02:27 -0200
Subject: [PATCH] feat(objectid): add valueOf to ObjectId prototype

fix #7299
fix graphql/graphql-js#1518

this make interop of ObjectId and GraphQL easier
---
 lib/types/objectid.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/types/objectid.js b/lib/types/objectid.js
index cbe9bd8b06a..692799e0994 100644
--- a/lib/types/objectid.js
+++ b/lib/types/objectid.js
@@ -24,4 +24,8 @@ Object.defineProperty(ObjectId.prototype, '_id', {
   }
 });
 
+ObjectId.prototype.valueOf = function() {
+  return this.toString();
+};
+
 module.exports = ObjectId;