mongooseで入れたデータがmongodbのコマンドラインから見れない件

hoge.js

#### node.js
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/counterdb');
var Schema = mongoose.Schema;
var CounterSchema = new Schema({
  count: Number
});
mongoose.model('Counter', CounterSchema);
var Counter = mongoose.model('Counter');
Counter.findOne({}, function(err, rec) {
    if(err || rec == null) {
        var counter = new Counter();
        rec = counter;
        rec.count = 1;
    } else {
        rec.count = rec.count + 1;
    }
    rec.save(function(err) {
        if (err) {
            console.error(err);
            return;
        }
    });
    console.log(rec);
});

$ node test.js
{ count: 1, _id: xxxxxxxxxxxxxxxxxxxxxxxxx }





#### mongo cli
$ mongo counterdb
> db.Counter.find()
>

(なんで？)