javascript - MongooseJS Not saving to array properly -

i want append value mongoose array array never seems update. following:

in controller, append eventname array eventsattending so:

  $scope.currentuser.eventsattending.push(event.eventname);   $http.put('/api/users/' + $scope.currentuser._id, $scope.currentuser)     .success(function(data){       console.log("success. user " + $scope.currentuser.name);     }); 

i try update array so:

// updates existing event in db. exports.update = function(req, res) {   if(req.body._id) { delete req.body._id; }   user.findbyid(req.params.id, function (err, user) {     if (err) { return handleerror(res, err); }     if(!user) { return res.send(404); }     user.markmodified('req.body.eventsattending');     user.save(function (err) {       if (err) { return handleerror(res, err);}       return res.json(200, user);     });   }); }; 

but array never seems update. i've tried following:

// updates existing event in db. exports.update = function(req, res) {   if(req.body._id) { delete req.body._id; }   user.findbyid(req.params.id, function (err, user) {     if (err) { return handleerror(res, err); }     if(!user) { return res.send(404); }     var updated = _.merge(user, req.body);     updated.markmodified('eventsattending');     updated.save(function (err) {       if (err) { return handleerror(res, err);}       return res.json(200, user);     });   }); }; 

with approach, array updates properly, when try perform http put after 1 time, error saying error: { [versionerror: no matching document found.] message: 'no matching document found.', name: 'versionerror' }

here userschema:

var userschema = new schema({   name: string,   username: string,   eventsattending: [{ type: string, ref: 'event'}], }); 

if appreciated.

my guess object returning _.merge no longer mongoose model , information getting lost in transform. try manually setting of fields coming request , use events.attending.push() add array, saving updated object , see happens.

your first example markmodified looks wrong. looking @ documentation should name of field modified , appears you've put source location it.

user.markmodified('user.eventsattending') 

however should not necessary if use push method mongoose overrides built-in array function track changes.