Remove sub-document from Mongo with mongoose

Question

I am trying to remove an item from a collection that is stored in a mongoose document. My document looks like this:

{
  \"__v\": 3,
  \"_id\": \"5221040475f         


        

Answer 1

You want inventory.items.pull(req.params.itemSku), followed by an inventory.save call. .remove is for top-level documents

Answer 2

    const deleteitem = (req, res) => {
    var id = req.body.id
    var iditem = req.body.iditem

    Venta.findOne({'_id': id}, function(err,result){
        if (err) {
            console.log(err);            
        }else{
            result.items.pull(iditem)
            result.save()
        }
    })}
module.exports = {deleteitem }

Answer 3

finaly!

MongoDB:

"imgs" : {"other" : [ {
        "crop" : "../uploads/584251f58148e3150fa5c1a7/photo_2016-11-09_21-38-55.jpg",
        "origin" : "../uploads/584251f58148e3150fa5c1a7/o-photo_2016-11-09_21-38-55.jpg",
        "_id" : ObjectId("58433bdcf75adf27cb1e8608")
                                    }
                            ]
                    },
router.get('/obj/:id',  function(req, res) {
var id = req.params.id;



Model.findOne({'imgs.other._id': id}, function (err, result) {
        result.imgs.other.id(id).remove();
        result.save();            
    });

Answer 4

Removing a subdocument from an array

The nicest and most complete solution I have found that both finds and removes a subdocument from an array is using Mongoose's $pull method:

Collection.findOneAndUpdate(
    { _id: yourCollectionId },
    { $pull: { subdocumentsArray: { _id: subdocumentId} } },
    { new: true },
    function(err) {
        if (err) { console.log(err) }
    }
)

The {new: true} ensures the updated version of the data is returned, rather than the old data.

Answer 5

Subdocuments now have a remove function. Use as follows from the spec:

var doc = parent.children.id(id).remove();
parent.save(function (err) {
  if (err) return handleError(err);
  console.log('the sub-doc was removed')
});

Answer 6

You can simply use $pull to remove a sub-document.

    Collection.update({
    _id: parentDocumentId
  }, {
    $pull: {
      subDocument: {
        _id: SubDocumentId
      }
    }
  });

This will find your parent document against given ID and then will remove the element from subDocument which matched the given criteria.