How to update multiple documents in mongodb native nodejs driver?

Question

Salam (means hello) :)

I'm running mongodb 2.4.8 and Mongo DB Native NodeJS Driver. when I use the following function, only first document that matched query updates. how can I update all matching documents?

function update(coll, query, update, callback){
    var options = options || {};
    MongoClient.connect('mongodb://127.0.0.1:27017/dbName', function(error, db) {
        if(error){
            return console.dir(error);
        }
        db.collection(coll).update(query, update, {w:1}, function(error, result) {
            callback(error, result);
        });
    });
}

I installed my mongodb driver via npm install mongodb command, which installs version 1.3.23, does this driver version support multi update? if not, how can I install a newer version of driver supports multi update?

JohnnyHK · Accepted Answer · 2014-01-08 13:53:11Z

3

You need to set the multi option in your update call to update all matching docs instead of just the first one:

db.collection(coll).update(query, update, {w:1, multi: true}, callback);

edited Jan 8, 2014 at 13:53

answered Jan 8, 2014 at 13:46

JohnnyHK

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2 Comments

Nasser Torabzade Over a year ago

thanks, I also found another document for update function which doesn't need neither callback function nor {w:1}, can you explain their difference?

JohnnyHK Over a year ago

@NasserTorabzade That doc is for the Mongo shell, not the node.js driver. But you likely don't need w:1 in your code, either.

raven.zuo · Accepted Answer · 2017-01-05 03:47:00Z

3

You can call updateMany to achieve this:

db.collection(coll).updateMany(query, update, callback);

answered Jan 5, 2017 at 3:47

raven.zuo

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