Unable to insert populated document w/ mongoose? - node.js

Question

I'm trying to populate a document field with referenced document with the right data and saving it to the database. However, I'm unable to insert a document correctly in the database, even though I had successfully saved the document.
**getting-started.js**
...
var personSchema = mongoose.Schema({
_id : Number,
name : String,
age : Number,
stories : [{ type: Schema.Types.ObjectId, ref: 'Story' }]
});
var storySchema = mongoose.Schema({
_creator : { type: Number, ref: 'Person' },
title : String,
fans : [{ type: Number, ref: 'Person' }]
});
var Story = mongoose.model('Story', storySchema);
var Person = mongoose.model('Person', personSchema);
var Johns = new Person({ _id: 15, name: 'Johns', age: 154});
Johns.save(function (err) {
if (err) {
console.log('Person Save error! %s', err);
}
var story1 = new Story({
title: "Once upon a timex??",
_creator: Johns._id // assign the _id from the person
});
story1.save(function (err) {
if (err) return handleError(err);
console.log('successful story save! %d', story1._creator);
});
});
Story
.find({ title: 'Once upon a timex######' })
.populate('_creator')
.exec(function (err, story) {
if (err) return handleError(err);
console.log("callback story: ", story);
story.save(function (err, story) {
if (err) return console.error(err);
console.log('successful save new story w/ populated _creator');
console.log('The story: creators name: %s', story._creator.name);
console.log('The story: creator field: %s', story._creator);
})
});
First time executing:
>>node getting-started.js
Following output:
>>opened conn to db
successful story save! 15
opened conn to db
{ fans: [],
__v: 0,
_creator: { stories: [], __v: 0, age: 154, name: 'Johns', _id: 15 },
title: 'Once upon a timex######',
_id: 56244cf796f73380353e803a }
successful save new story w/ populated _creator
The story: creators name: Johns
The story: creator field: { stories: [], __v: 0, age: 154, name: 'Johns', _id: 15 }
However, after commenting out the following code:
var Johns = new Person({ _id: 15, name: 'Johns', age: 154});
Johns.save(function (err) {
if (err) {
console.log('Person Save error! %s', err);
}
var story1 = new Story({
title: "Once upon a timex??",
_creator: Johns._id // assign the _id from the person
});
story1.save(function (err) {
if (err) return handleError(err);
console.log('successful story save! %d', story1._creator);
});
});
the next time I'm executing
Story
.find({ title: 'Once upon a timex######' })
.exec(function (err, story) {
if (err) return handleError(err);
console.log("callback story: ", story);
});
I'm unable to see my saved Story with the populated field of _creator, it still only has the person _id and not the person object:
{ fans: [],
__v: 0,
_creator: 15,
title: 'Once upon a timex######'
_id: 56244cf796f73380353e803a }