jquery - How look up JSON object in Handlebar expressions -

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i'm using handlebars , trying use post's userid find user's username , pic; i'm using userid placeholder correct expression. i've tried several ways data json files instead of having inline, haven't gotten right.

{{#posts}}  <div class="post">     <div class="avatar">         <img src="{{userid}}">     </div>     <div class="post-content">         <a href="#">{{userid}}</a>         {{content}}     </div>       <div class="post-comments">         {{#comments}}          <div class="comment">             <div class="avatar">                 <img src="{{userid}}">             </div>             <a href="#">{{userid}}</a>             {{content}}         </div>         {{/comments}}          <input type="text" name="comment" placeholder="post comment"/>     </div>               </div> {{/posts}}   var source = $("#posttemplate").html();  var template = handlebars.compile(source); var data = {  posts: [ {   "id": 1,   "userid": 1,   "content":"love wine? love food?",   "comments": [     {       "id": 13,       "postid": 1,       "userid": 2,       "content": "would happen know capone is? "     }   ] }, {   "id": 2,   "userid": 2,   "content":"day 2 of house sitting...awww firends trust me!",   "comments": [] } ], users: [ {   "id": 1,   "username": "james bond",   "pic": "images/profile/sean-connery-as-james-bond.jpg", }, {   "id": 2,   "username": "william forrester",   "pic": "images/profile/2001_finding_forrester_008.png", } ] };  $('.feed').append(template(data));

if convert users array object keys userid's like:

users: {       "1": {               "username": "james bond",               "pic": "http://i49.tinypic.com/28vepvr.jpg",            },      "2": {             "username": "william forrester",             "pic": "http://i46.tinypic.com/2epim8j.jpg",       } }

then can create 2 custom helpers shown below:

var data = {    posts: [{      "id": 1,      "userid": 1,      "content": "love wine? love food?",      "comments": [{        "id": 13,        "postid": 1,        "userid": 2,        "content": "would happen know capone is? "      }]    }, {      "id": 2,      "userid": 2,      "content": "day 2 of house sitting...awww firends trust me!",      "comments": []    }],    users: {      "1": {        "username": "james bond",        "pic": "http://i49.tinypic.com/28vepvr.jpg",      },      "2": {        "username": "william forrester",        "pic": "http://i46.tinypic.com/2epim8j.jpg",      }    }  }  handlebars.registerhelper('username', function(options) {    var userinfo = options.data.root.users[this.userid];    return userinfo ? userinfo.username : "";  });  handlebars.registerhelper('avatar', function(options) {    var userinfo = options.data.root.users[this.userid];    return userinfo ? userinfo.pic : "";  });  var source = $("#posttemplate").html();  var template = handlebars.compile(source);  $('.feed').append(template(data));
.post{    margin:5px;  }  .post-comments{    padding-left:20px;  }  img {    width: 50px;  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <script src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/2.0.0/handlebars.min.js"></script>  <script type="text/template" id="posttemplate">    {{#each posts}}    <div class="post">      <div class="avatar">        <img src="{{avatar}}">      </div>      <div class="post-content">        <a href="#">{{username}}</a>        {{content}}      </div>      <div class="post-comments">        {{#each comments}}        <div class="comment">          <div class="avatar">            <img src="{{avatar}}">          </div>          <a href="#">{{username}}</a>          {{content}}        </div>        {{/each}}        <input type="text" name="comment" placeholder="post comment" />      </div>    </div>    {{/each}}  </script>  <div class="feed"></div>

or can keep array , iterate on until find match inside helpers, costly:

var data = {    posts: [{      "id": 1,      "userid": 1,      "content": "love wine? love food?",      "comments": [{        "id": 13,        "postid": 1,        "userid": 2,        "content": "would happen know capone is? "      }]    }, {      "id": 2,      "userid": 2,      "content": "day 2 of house sitting...awww firends trust me!",      "comments": []    }],    users: [{      "id": 1,      "username": "james bond",      "pic": "http://i50.tinypic.com/f0ud01.jpg",    }, {      "id": 2,      "username": "william forrester",      "pic": "http://i49.tinypic.com/28vepvr.jpg",    }]  };  handlebars.registerhelper('username', function(options) {    var id = this.userid,      userinfo = $.grep(options.data.root.users, function(userinfo) {        return userinfo.id == id;      })[0];    return userinfo ? userinfo.username : "";  });  handlebars.registerhelper('avatar', function(options) {    var id = this.userid,      userinfo = $.grep(options.data.root.users, function(userinfo) {        return userinfo.id == id;      })[0];    return userinfo ? userinfo.pic : "";  });  var source = $("#posttemplate").html();  var template = handlebars.compile(source);  $('.feed').append(template(data));
.post {    margin: 5px;  }  .post-comments {    padding-left: 20px;  }  img {    width: 50px;  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <script src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/2.0.0/handlebars.min.js"></script>  <script type="text/template" id="posttemplate">    {{#each posts}}    <div class="post">      <div class="avatar">        <img src="{{avatar}}">      </div>      <div class="post-content">        <a href="#">{{username}}</a>        {{content}}      </div>      <div class="post-comments">        {{#each comments}}        <div class="comment">          <div class="avatar">            <img src="{{avatar}}">          </div>          <a href="#">{{username}}</a>          {{content}}        </div>        {{/each}}        <input type="text" name="comment" placeholder="post comment" />      </div>    </div>    {{/each}}  </script>  <div class="feed"></div>

p.s: first handlebars encounter (i've been reading this past few hours) there might better way


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