To use Mongoose to update values in array of objects with Node.js, we use the $set operator.
For instance, we write
Person.update(
{ "items.id": 2 },
{
$set: {
"items.$.name": "updated",
"items.$.value": "two updated",
},
},
(err) => {}
);
to call update with an object with $set set to an object with the fields in the item with id 2 to update.
The item being updated is the object in items with id 2.
We update the name and value fields of it.
