How to find out if insertion or update occured in mongo

Question

I have the following code in my node.js application where I either update a field or insert a new entry:

 DocPrivilege.update({
                _id: {
                    $in: user.documentsPriv
                }
            }, {
                $set: {
                    access: parseInt(req.body.access),
                    documentName: req.body.documentName,
                    documentId: req.body.documentId
                }
            }, {
                upsert: true
            }, function(err, updated) {
                if (err || !updated) console.log("User not updated");
                else {
                    console.log("User updated");
                }
            });

Is there a way how I can differentiate if an update or an insertion occured?

More specifically the second answer is node.js – Sammaye Jul 03 '13 at 16:35 — Sammaye, Jul 03 '13 at 16:35

AntonioOtero · Accepted Answer · 2013-07-03T15:37:38.513

2

You have to use db.getLastError().

It gives you an object with several properties. The property "n" gives you the number of documents updated.

Here's some documentation about it, and here's an example of getLastError in node.js

edited Jul 03 '13 at 15:37

answered Jul 03 '13 at 15:31

AntonioOtero

1,759
1
14
16

How to find out if insertion or update occured in mongo

1 Answers1