From b070efc32ccce04c98549a80bc0209572a4f1bfb Mon Sep 17 00:00:00 2001
From: mishaschwartz <misha.schwartz@gmail.com>
Date: Wed, 6 Jan 2021 10:03:26 -0500
Subject: [PATCH] cell data: make sure that the cell id (from nbformat 4.5) is
 kept when saving notebooks

---
 notebook/static/notebook/js/cell.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/notebook/static/notebook/js/cell.js b/notebook/static/notebook/js/cell.js
index 023b3d375..dbe031359 100644
--- a/notebook/static/notebook/js/cell.js
+++ b/notebook/static/notebook/js/cell.js
@@ -490,6 +490,9 @@ define([
         var data = {};
         // deepcopy the metadata so copied cells don't share the same object
         data.metadata = JSON.parse(JSON.stringify(this.metadata));
+        if (this.id !== undefined) {
+            data.id = this.id;
+        }
         if (data.metadata.deletable) {
             delete data.metadata.deletable;
         }
@@ -511,6 +514,9 @@ define([
         if (data.metadata !== undefined) {
             this.metadata = data.metadata;
         }
+        if (data.id !== undefined) {
+            this.id = data.id;
+        }
     };