node.js - Express: Embed document in the existing document -

i developing application in express, node , mongo being database. have collection users, , user can have mutiple registered-ids. one-to-many relationship. m trying embed document in user collection this:

post(function (req, res, next) {     var pid=req.body.pid;     var sid=req.body.sid;     var rfname=req.body.rfname;     var des=req.body.des;     var brand=req.body.brand;     var model=req.body.model;     var serial=req.body.serial;     var location=req.body.location;      var arr={pid: 'pid', sid: 'sid', rfname: 'rfname' ,des: 'des', brand: 'brand', model: 'model' ,serial: 'serial', location: 'location'};      mongoose.model('user').findone({'pemail': req.session.email}, function (err, user){         if(err){          } else {             user.registeredid = arr;              user.save(function(err){                 if(err){                  } else {                     res.render('user/register', {'success': 'dfhlaksdhfh'});                 }             })         }     }); } 

my user schema this:

var mongoose = require('mongoose');   var userschema = new mongoose.schema({     email: string,   password: string,   fname: string,   lname: string,   plang: string,   slang: string,   country: string,   state: string,   city: string,   postalcode: string,   address1: string,   address2: string,   pemail: string,   semail: string,   age: string,   gender: string,   pphone: string,   sphone: string,   q1: string,   a1: string,   q2: string,   a2: string,   cfname: string,   clname: string,   cemail: string }); mongoose.model('user', userschema); 

guide me, doing wrong, because not embed document in existing document. need define in schema, if so, how?

in schema definition, field registeredid not defined , default through strict option, mongoose ensures values passed model constructor not specified in our schema not saved db, hence not creating modified document.

you can either explicitly define field in schema or set strict option false in schema definition:

// set false.. var userschema = new schema({..}, { strict: false }); 

and implement 1 of findandmodify() methods findoneandupdate() update user document pushing new object new array field registeredid. re-write post function as:

post(function (req, res, next) {     var user = mongoose.model('user'),         pid=req.body.pid,         sid=req.body.sid,         rfname=req.body.rfname,         des=req.body.des,         brand=req.body.brand,         model=req.body.model,         serial=req.body.serial,         location=req.body.location,          arr = {             'pid': pid,              'sid': sid,              'rfname': rfname,             'des': des,              'brand': brand,              'model': model,             'serial': serial,              'location': location         },         condition = { 'pemail': req.session.email },         update = {             "$push": { 'registeredid': arr }         };      user.findoneandupdate(         condition,         update,         function (err, doc){             if(err){}              else {                 // doc contains modified document                 res.render('user/register', {'success': 'dfhlaksdhfh'});             }         }     ); });