populate in mongodb with meteor -

i using meteor.js. having 3 collections boards,categories,users.

boards :   {  "_id": objectid("su873u498i0900909sd"),   "locked": numberint(0),  "board_name": "legends",   "description": "legends of world",    "cat_id":  objectid("su873u498i0900909sd"),   "cost": numberint(1),  "image": "1389249002691_indexhj.jpeg", "creator": objectid("52ce317994acdcee0fadc90c") }  categories: { "_id": objectid("su873u498i0900909sd"),  "user_id": objectid("su873u498i0900909sd"), catname:"hjjj"  }  users: {  "_id":objectid(55acec2687fe55f12ded5b4a), "username" :"mariya" } 

from want username in users collection referred in categories collection user_id field categories collection referred in boards collection cat_id. how trying it.

 boards.find({_id:"objectid(55acec2687fe55f12ded5b4a)"},function(res){   if(res){   categories.find({_id:res.cat_id},function(res1){    if(res1){      users.find({_id:res.user_id},function(res3){       res.send(res3)      })     })  }) 

as using mongoose in meteor affect performance cannot use populate method. there other way achieve result rather above one?

probably collection helpers.

basic usage:

boards.helpers({   creator: function () {     return meteor.users.findone(this.creatorid);   },   category: function () {     return categories.findone(this.categoryid);   } }); 

usage in template pretty simple. let's have board:

{{#each boards}}   <div>     <h3>{{board_name}}</h3>     <p>created by</p>: {{ creator.username }}     <p>category</p>: {{ category.catname }}   </div> {{/each}} 

added tip: use publish-composite publish relationships in more manageable fashion.

meteor.publishcomposite('board', function (boardid) {   check(boardid, string);   return {     find: function () {       return boards.find(boardid);     },     children: [{       find: function (board) {         return meteor.users.find(board.creatorid);       }     }, {       find: function (board) {         return categories.find(board.categoryid);       }     }]   } });