如何从mongodb中的数组中删除对象？

Question

i using MongoDb and NodeJs and i have a little problem with deleting object from array of objects. Here is my code

router.route('/deleteGuestFromJam/:id').delete(function(req, res){

Jam.find({_id: req.params.id}, function(err, jam){

    jam.guests = _.without(jam.guests, _.findWhere(jam.guests, {id: req.user.id}));

    jam.save(function(err, jam) {
        if (err){
            return res.status(500).send(err)
        }
        console.log(jam.guests)
        return res.status(200).send(jam);
    });

})

And when i call this route the console give me "jam.save is not a function" error. Someone can explain me why is it happening ?. Thx for answers

Answer 1

You can use update like this

Jam.update({_id: req.params.id}, 
    { $pull: { 
           guests: { 
                  $elemMatch: { id: req.user.id } 
           } 
       } 
     }, function(){....});

It will pull out the matched object from quests array. See mongo docshere