MongoError: cannot change _id of a document

Question

I\'m newbie to MongoDB and Backbone, so I try to understand them, but it is hard. I have a big, big problem: I cannot understand how to manipulate attributes in Backbone.Mod

Answer 1

MongoDB creates _id as an ObjectID, but doesn't retrieve _id as an ObjectID.

Whether this inconsistency is 'correct behaviour' or not, it is certainly an annoying surprise for most MongoDB users.

You can fix it with:

if ( this._id && ( typeof(this._id) === 'string' ) ) {
  log('Fixing id')
  this._id = mongodb.ObjectID.createFromHexString(this._id)
}

See MongoDB can't update document because _id is string, not ObjectId