无法使用javascript和mongodb将json对象推入数组

Question

I have a problem pushing into my Student model data and its schema looks as below:

var StudentSchema = new Schema({
    firstName: {
        type: String,
        trim: true,
        default: ''
        //validate: [validateLocalStrategyProperty, 'Please fill in your first name']
    },
    lastName: {
        type: String,
        trim: true,
        default: ''
        //validate: [validateLocalStrategyProperty, 'Please fill in your last name']
    },
    worksnap: {
        user: {
            type: Object
        },
        timeEntries : [],
    },
    timeEntries : []
});

While my javascript code for pushing items looks like this:

Student.findOne({
            'worksnap.user.user_id': item.user_id[0]
        })
        .populate('user')
        .exec(function (err, student) {
            if (err) {
                throw err;
            }
            //student.timeEntries.push(item); // this works
            student.worksnap.timeEntries.push(item); // this does not work
            student.save(function (err) {
                if (err) {
                    //return res.status(400).send({
                    //    message: errorHandler.getErrorMessage(err)
                    //});
                } else {
                    console.log('item inserted...');
                }
            });

        });

As you can see, if I use timeEntries array outside the worksnap object it works fine, it inserts the item as object into that array... I just don't know why it is not working the same being inside worksnap object.

Is there any other option that I can add json objects into an array type in mongo

Thanks

Answer 1

Use .lean()

Documents returned from queries with the lean option enabled are plain JavaScript objects, not MongooseDocuments . They have no save method, getters/setters or other Mongoose magic applied.

 Student.findOne({ 'worksnap.user.user_id': item.user_id[0] }) .populate('user') .lean()//-----Added! .exec(function(err, student) { if (err) { throw err; } //student.timeEntries.push(item); // this works student.worksnap.timeEntries.push(item); // this does not work student.save(function(err) { if (err) { //return res.status(400).send({ // message: errorHandler.getErrorMessage(err) //}); } else { console.log('item inserted...'); } }); });