Re: How to get the ObjectId of a newly saved document?

[Darrell Banks]

Hey there!

I'm pretty new to the game also, I understand your pain. Have you tried to use the "_id" attribute?

Banx

[mkoistinen]

Yes, and it works in all of the other places where I need to use the _id throughout the rest of the app.  Its just in cases where I'm saving a new document that the Mongoose API doesn't appear to have a 'standard' callback with the signature callback(err, document).  I must be missing something...

[Siegfried Ehret]

You can add this :

BlogPost.virtual('id').get(function () {
  return this._id.toHexString();
}); 

then, calling myPost.id should give you what you want.

[YANG Xudong]

If I'm not misunderstanding your problem, you could do this:

var newEntry = new Entry(...);

newEntry.save(function (err) {

  newEntry._id;    // Hey!

});

=======================
杨旭东 YANG Xudong "Wyverald"

Tumblr - Twitter - GitHub - Douban

Juntos, unidos, triunfará nuestro deseo de ser el mejor

alias please=sudo

please rm -rf /

[mkoistinen]

Hi.  Thanks for taking the time to reply.

Your solution looks great if I need to alias id so that it equals _id.  However, my problem is a bit different.  When I create a new document, the ObjectId doesn't exist until the document is saved to the database.  And, unfortunately, I don't see how I can get this ObjectId directly from the save() method.  I can obtain it if I search for the object again, but this isn't ideal, as my document's have only one unique key - the UniqueId.

I've posted an example here: https://groups.google.com/d/topic/mongoose-orm/ocfUIt5ghLI/discussion

Let's continue the discussion there. =)

[mkoistinen]

This is precisely what I would like to do, but its not working for me.  Does it work for you?

Also, I've posted a better thread for this here: https://groups.google.com/d/topic/mongoose-orm/ocfUIt5ghLI/discussion

[bingomanatee]

Problem solved

see

http://wonderlandlabs.com/wll_drupal/node/mongoose/insert_id.html

[Aaron Heckmann]

ObjectIds are created upon instantiation:

    var thinger = new Thinger;

    console.error(thinger.id); // 4d8634bbd0d2264d28000001

    thinger.save(function (err) {

       // still works here too

       console.error(thinger.id); // 4d8634bbd0d2264d28000001

    })

Just make sure you store a local ref to your thinger by using the var keyword, else you'll set 'thinger' as a global and get all sorts of unpredictable behavior.

--
Aaron