From 327b47a1ee3e65abd2b09ced20d129a2dbd6e8ae Mon Sep 17 00:00:00 2001
From: Valeri Karpov <val@karpov.io>
Date: Fri, 11 Oct 2019 11:03:13 -0400
Subject: [PATCH] fix(subdocument): make subdocument#isModified use parent
 document's isModified

Fix #8223
---
 lib/types/subdocument.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/types/subdocument.js b/lib/types/subdocument.js
index 92a88489523..cb4db5c1651 100644
--- a/lib/types/subdocument.js
+++ b/lib/types/subdocument.js
@@ -115,6 +115,16 @@ Subdocument.prototype.markModified = function(path) {
   }
 };
 
+Subdocument.prototype.isModified = function(paths, modifiedPaths) {
+  if (this.$parent && this.$basePath) {
+    paths = (Array.isArray(paths) ? paths : paths.split(' ')).
+      map(p => [this.$basePath, p].join('.'));
+    return this.$parent.isModified(paths, modifiedPaths);
+  }
+
+  return Document.prototype.isModified(paths, modifiedPaths);
+};
+
 /**
  * Marks a path as valid, removing existing validation errors.
  *