Salam (means Hello) :)

I need to check if a collection exists on a certain database and create it if it doesn't. I know that

db.createCollection(collName, {strict:true}, function(error, collection))

checks for existance of collection collName before creating it and sets error object. but I need an independent function to check that.

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?