From e9ebc5151d1c9d5c2a82ceebf9d6edd1d4d5aa90 Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Mon, 21 Jan 2019 11:23:32 +0900
Subject: [PATCH] =?UTF-8?q?[Server]=20Fix=20bug:=20=E3=83=AA=E3=83=A2?=
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---
 src/misc/cafy-id.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/misc/cafy-id.ts b/src/misc/cafy-id.ts
index 621f7e794..b99a27ee4 100644
--- a/src/misc/cafy-id.ts
+++ b/src/misc/cafy-id.ts
@@ -5,7 +5,8 @@ import isObjectId from './is-objectid';
 export const isAnId = (x: any) => mongo.ObjectID.isValid(x);
 export const isNotAnId = (x: any) => !isAnId(x);
 export const transform = (x: string | mongo.ObjectID): mongo.ObjectID => {
-	if (x == null) return null;
+	if (x === undefined) return undefined;
+	if (x === null) return null;
 
 	if (isAnId(x) && !isObjectId(x)) {
 		return new mongo.ObjectID(x);