Mongoose - Update a nested object in array in MongoDB - node.js

Question

Alright, this might have been asked quite a lot of times but none of them gives me a solution.
Here's my schema.
{
"_id" : ObjectId("23453453453453"),
"title": "Item 01"
"checkList" : [
{
"ch_id" : "621eff4e0ed5c751adaa42fb",
"status" : "statu",
"dateMonthYear" : 1646286480139.0,
"val" : "Gopi",
"remarks" : "Good",
"_id" : ObjectId("7555777575")
},
{
"ch_id" : "621eff4e0ed5c751adaa42fb",
"status" : "status",
"dateMonthYear" : 1646286480139.0,
"val" : "Gopi",
"remarks" : "Good",
"_id" : ObjectId("7555777575")
}
]
}
What I want to do is update the status in the 2nd object in the checklist array. I can use the following query to update this just fine.
const itemUpdated = await Item.updateOne(
{_id: id, 'checklist._id': req.params.id},
{$set: { "checklist.$.status": req.body.status }},
);
But, I want to use Mongoose method like save() to update this. Not RAW query. Because with Mongoose methods, I get extra layer of validation and middleware. I checked all over internet but only found ones with raw queries.
How to update a nested object in array with Mongoose ORM ?

Answer 1

Retrieve the Item and loop to its checkList updating the status:
const item = await Item.findOne({ _id: id, 'checklist._id': req.params.id });
if (!item || item.checkList.length === 0) return;
for (let i = 0; i < item.checkList.length; i++) {
item.checkList[i].status = req.body.status;
}
await item.save();

Answer 2

I finally found this solution that works best for this situation. I don't know why Mongoose docs are so poorly written.
If we have an array of subdocuments, we can fetch the one we need with id() method provided by Mongoose.
const item = await Item.findById(id);
checkListItem = item?.checklist.id(req.params.id);
if(checkListItem){
checkListItem.status = req.body.status;
item?.save();
}
This worked for me. Hope someone might find this useful!