How to check whether a document was inserted or updated when using findOneAndUpdate?

Question

Chatrooms.findOneAndUpdate({Roomname: room.Roomname},{ $setOnInsert: {status: true, userNum: 1}}, {new: true, upsert: true}, function(err, doc) {
    if(err) console.log(err);

    console.log("DOC " + doc)

    if(doc.status) {
        // FOUND ROOM SATTUS IS TRUE LOGIC 
        console.log(doc);
        // return callback(true)
    }
 });

Above query will return to me the actual document that's updated or inserted but I can't check exactly which one it is. If I do an update instead of findOneandUpdate I'm returned this

{
    ok: 1,
    nModified: 0,
    n: 1,
    upserted: [ { index: 0, _id: 55df883dd5c3f7cda6f84c78 } ]
} 

How do I return both the document and the write result or at least the upserted field from the write result.

Answer 1

As of 8 August 2019 (Mongoose Version 5.6.9), the property to set is "rawResult" and not "passRawResult":

M.findOneAndUpdate({}, obj, {new: true, upsert: true, rawResult:true}, function(err, d) {
    if(err) console.log(err);
    console.log(d);
});

Output:

{ lastErrorObject:
   { n: 1,
     updatedExisting: false,
     upserted: 5d4befa6b44b48c3f2d21c75 },
  value: { _id: 5d4befa6b44b48c3f2d21c75, rating: 4, review: 'QQQ' },
  ok: 1 }

Notice also the result is returned as the second parameter and not the third parameter of the callback. The document can be retrieved by d.value.