Mongoose delete array element in document and save

Question

I have an array in my model document. I want to delete some components in that array and want to update MongoDB. Is this achievable?

I am able to find that field but not able to replace or update

The following is my implementation:

var mongoose = require('mongoose'),

    Schema = mongoose.Schema;

var favorite = new Schema({

    cn: String,

    favorites: Array

});

module.exports = mongoose.model('Favorite', favorite, 'favorite');

exports.deleteFavorite = function (req, res, next) {

    if (req.params.callback !== null) {

        res.contentType = 'application/javascript';

    }

    Favorite.find({cn: req.params.name}, function (error, docs) {

        var records = {'records': docs};

        if (error) {

            process.stderr.write(error);

        }

        docs[0]._doc.favorites.remove({uid: req.params.deleteUid});

        Favorite.save(function (error, docs) {

            var records = {'records': docs};

            if (error) {

                process.stderr.write(error);

            }

            res.send(records);

            return next();

        });

    });

};

Answer 1

For deleting the items from the array, you can use the $pull or $pullAll operators, refer to the following code:

Favorite.updateOne( {cn: req.params.name}, { $pullAll: {uid: [req.params.deleteUid] } } )

And one more thing you can simply update your mongodb without updating or making any change to the document that resides inside the mongodb database.