Updating multiple fields in a document with MongooseJS

Let's say I have an ABC diagram that looks like this:

ABC = mongoose.Schema ({
    name: String
    , x: String
    , y: String
    , z: String
});

      

        
        
        
      

    

I want to update the x and y fields if the name is the same. Is this possible with MongooseJS API?

I tried the following and didn't work:

ABC = mongoose.createConnection(uri).model('ABC', ABC)
...
ABC.findOne({'name': abc.name}).exec(function(err, found) {
    if(found) {
        ABC.update({'name':abc.name}, {'x':abc.x, 'y':abc.y}).exec();
    }
    ...
});

      

        
        
        
      

    

Even if possible, is it better to just update the ABC object and use ABC.save (abc) instead? I read on another thread that updating is better than saving because it is stored. It's true?

Any advice is appreciated!