From bce640e51485c322e25543d51403f92339d90a88 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bar=C4=B1=C5=9F=20Soner=20U=C5=9Fakl=C4=B1?=
 <baris@nodebb.org>
Date: Sat, 3 Mar 2018 12:31:20 -0500
Subject: [PATCH] closes #6340

---
 src/database/mongo/main.js | 16 +++++++++++++++-
 test/database/keys.js      |  8 ++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/database/mongo/main.js b/src/database/mongo/main.js
index b8ceaa4f6f..55a29e6ff9 100644
--- a/src/database/mongo/main.js
+++ b/src/database/mongo/main.js
@@ -66,7 +66,21 @@ module.exports = function (db, module) {
 		if (!key) {
 			return callback();
 		}
-		module.getObjectField(key, 'data', callback);
+		module.getObject(key, function (err, objectData) {
+			if (err) {
+				return callback(err);
+			}
+			// fallback to old field name 'value' for backwards compatibility #6340
+			var value = null;
+			if (objectData) {
+				if (objectData.hasOwnProperty('data')) {
+					value = objectData.data;
+				} else if (objectData.hasOwnProperty('value')) {
+					value = objectData.value;
+				}
+			}
+			callback(null, value);
+		});
 	};
 
 	module.set = function (key, value, callback) {
diff --git a/test/database/keys.js b/test/database/keys.js
index cdd8cc9ab4..6b187b4e3d 100644
--- a/test/database/keys.js
+++ b/test/database/keys.js
@@ -27,6 +27,14 @@ describe('Key methods', function () {
 		});
 	});
 
+	it('should return null if key does not exist', function (done) {
+		db.get('doesnotexist', function (err, value) {
+			assert.ifError(err);
+			assert.equal(value, null);
+			done();
+		});
+	});
+
 	it('should return true if key exist', function (done) {
 		db.exists('testKey', function (err, exists) {
 			assert.ifError(err);