From 7b940a7d98bb9ee4c93a9e16c3e669a8cd5cb6b3 Mon Sep 17 00:00:00 2001
From: Elwood Johnson <elwood.w.johnson.ctr@mail.mil>
Date: Tue, 13 Jul 2021 17:58:45 -0400
Subject: [PATCH] fix: `null` value not persisted for JSON, Any, Object types

fixes #1895

Signed-off-by: Rifa Achrinza <25147899+achrinza@users.noreply.github.com>
---
 lib/dao.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/dao.js b/lib/dao.js
index bd9c8180..7ffdc700 100644
--- a/lib/dao.js
+++ b/lib/dao.js
@@ -179,10 +179,12 @@ DataAccessObject._forDB = function(data) {
   const res = {};
   for (const propName in data) {
     const type = this.getPropertyType(propName);
-    if (type === 'JSON' || type === 'Any' || type === 'Object' || data[propName] instanceof Array) {
-      res[propName] = JSON.stringify(data[propName]);
+    const value = data[propName];
+    if (value !== null && (type === 'JSON' || type === 'Any' ||
+        type === 'Object' || value instanceof Array)) {
+      res[propName] = JSON.stringify(value);
     } else {
-      res[propName] = data[propName];
+      res[propName] = value;
     }
   }
   return res;