How to create ObjectId in Mongoose 4.0.x from Hex string?

Question

mongoose.mongo.Types.ObjectId does not have fromString or fromHexString functions. It seems that new mongoose.mongo.Types.ObjectId(hexString) does not create an object id either.

var id = new mongoose.Types.ObjectId(hexString);
db.Record.find({_id:id }, function (err, campaign){
    if(err) console.log(err);
    callback(campaign);
});

And what's `hexString`? ObjectId generally accepts hexadecimal strings ? — adeneo, Apr 28 '15 at 16:43
I would venture to guess that your problem isn't that `campaign` is null, but rather that it's returning an array and you're trying to access the properties of the document against the array, not a single document. Change your query to use `findById`. If that's not the case, what's the value of `id` before the query is executed? — Brian Shamblen, Apr 28 '15 at 17:56
returns empty array. Tired find one and findById still no success. — swogger, Apr 29 '15 at 10:20

score 6 · Answer 1 · answered Oct 07 '15 at 23:14

I finally found the method you're looking for. The mongoose.Types.ObjectId class has a static function called createFromHexString, which returns an instance of an ObjectId.

var id = mongoose.Types.ObjectId.createFromHexString(hexString);
db.Record.findOne({_id: id}, function (err, campaign){
    if(err) console.log(err);
    callback(campaign);
});

How to create ObjectId in Mongoose 4.0.x from Hex string?

1 Answers1