node.js - Doing update on MongooseJS Schema Array that is using Populate -

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i using mongoose population join documents

var usersschema = schema({         username: string,         password: {type: string, select: false },         fname: string,         lname: string,         role: string,         apps: [             {                 //using populate here                 app: {type:objectid, ref: "applications"},                 pinned: boolean             }         ]     }, { collection : 'user' });

this being called this

findbyid: function(id, items, callback){             user.findbyid(id, items , function(err, doc){                 callback(doc);             }).populate("apps.app");         }

this works groovy. problem when want push in new app value being populated. doing.

client:

$.ajax({             type: "put",             url: userurl + userid,             contenttype: "application/json",             data: json.stringify({                 "app": currentapp.attributes._id,                 "pinned": false             }),             success: function(){                 console.log("success");             }         })

node server:

user.findbyidandupdate(id,                     {                         $push : {                             apps : {                                 pinned:updateobj.pinned,                                 app:updateobj.app                             }                         }                     }, options, function(err, data){                     callback(data);                 });

this seems update correct. issue way being added mongo document

{     "_id": {         "$oid": "520953dde4b00c03eeb39950"     },     "apps": [         {             "app": "5217685be4b061d31fe3cc41",             "pinned": true         },         {             "app": "5208edb2e4b0b41ab826aca1",             "pinned": false         }, //this added         {             "pinned": false,             "app": {                 "$oid": "5208ed90e4b0b41ab826ac9f"             },             "_id": {                 "$oid": "5217ac368d334b020000000a"             }         }     ],     "fname": "frank",     "lname": "miggz",     "password": "password123",     "role": "2",     "username": "blah" }

how i:

remove _id have value of app show looks 

"app": "5208ed90e4b0b41ab826ac9f"

just realized values pre-populated should have been in format getting since set "type:objectid" in schema. believe have repopulate match objectid structure


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