I am trying to pull/remove values from an array (subdocument).

Example doc:

{
   _id: 5150a1199fac0e6910000002,
   name: 'some name,
   items: [{
      id: 23,
      name: 'item name 23'
   },{
      id: 24,
      name: 'item name 24'
   }]
}

I have the doc in memory as I pulled it from mongo already. I am trying:

var left = object.items.pull({id: 24});
console.log(left)

Outputs:

[{
   id: 23,
   name: 'item name 23',
   _id: 5150a1199fac0e6910000045
},{
  id: 24,
  name: 'item name 24',
  _id: 5150a1199fac0e6910000002 
}]

So looks like I already have a problem. The array returned from the pull call should be whats left in the array after the pull . Not sure why it did not pull from the item array. Does this only support pulling by ObjectId ant not user defined fields?

I call save:

object.save();

Mongoose logs this as the query:

Mongoose: mycollection.update({ _id: ObjectId("5150901ac345824a07000002"), __v: 3 }) 
  { '$inc': { __v: 1 }, '$pull': 
    { attachments: { _id: { '$in': [ ObjectId("5150c64d63773efb1f000002") ] } } } } {}

This shows why my document is not being removed. The _id of the array item that should be removed is:

_id: 5150a1199fac0e6910000002

The item that mongoose is sending to the database to remove is:

ObjectId("5150c64d63773efb1f000002")

Any ideas what I am doing wrong? I am trying to delete by something other than _id, not sure if that is possible but from the docs looks to be.

node.js mongodb mongoose
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