.json

{
  "projects": [
    {
      "updated": null, 
      "name": "USA", 
      "created": null, 
      "is_active": true, 
      "persons": [
        {
          "updated": null, 
          "user_id": "HGOWDA", 
          "name": "H Gowda", 
          "created": null, 
          "passwd": null, 
          "is_active": true, 
          "id": "1", 
          "project_id": "1", 
          "email": "h.gowda@temp.com"
        }, 
        {
          "updated": null, 
          "user_id": "JECHEN", 
          "name": "J Chen", 
          "created": null, 
          "passwd": null, 
          "is_active": true, 
          "id": "2", 
          "project_id": "1", 
          "email": "j.chen@temp.com"
        }
      ], 
      "iterations": [
        {
          "updated": null, 
          "name": "iteration 001", 
          "created": null, 
          "is_active": true, 
          "project_id": "1", 
          "id": "1"
        }, 
        {
          "updated": null, 
          "name": "iteration 002", 
          "created": null, 
          "is_active": true, 
          "project_id": "1", 
          "id": "2"
        }, 
        {
          "updated": null, 
          "name": "iteration 003", 
          "created": null, 
          "is_active": true, 
          "project_id": "1", 
          "id": "3"
        }
      ], 
      "id": "1", 
      "desc": "Team USA"
    }, 
    {
      "updated": null, 
      "name": "EMEA", 
      "created": null, 
      "is_active": true, 
      "persons": [
        {
          "updated": null, 
          "user_id": "MINMA", 
          "name": "Ming Ma", 
          "created": null, 
          "passwd": null, 
          "is_active": true, 
          "id": "3", 
          "project_id": "2", 
          "email": "ming.ma@temp.com"
        }, 
        {
          "updated": null, 
          "user_id": "JPATARD", 
          "name": "J Patard", 
          "created": null, 
          "passwd": null, 
          "is_active": true, 
          "id": "4", 
          "project_id": "2", 
          "email": "j.patard@temp.com"
        }
      ], 
      "iterations": [
        {
          "updated": null, 
          "name": "iteration 004", 
          "created": null, 
          "is_active": true, 
          "project_id": "2", 
          "id": "4"
        }, 
        {
          "updated": null, 
          "name": "iteration 005", 
          "created": null, 
          "is_active": true, 
          "project_id": "2", 
          "id": "5"
        }, 
        {
          "updated": null, 
          "name": "iteration 006", 
          "created": null, 
          "is_active": true, 
          "project_id": "2", 
          "id": "6"
        }
      ], 
      "id": "2", 
      "desc": "Team EMEA"
    }, 
    {
      "updated": null, 
      "name": "India", 
      "created": null, 
      "is_active": true, 
      "persons": [
        {
          "updated": null, 
          "user_id": "KAMBLE", 
          "name": "K Amble", 
          "created": null, 
          "passwd": null, 
          "is_active": true, 
          "id": "5", 
          "project_id": "3", 
          "email": "k.amble@temp.com"
        }, 
        {
          "updated": null, 
          "user_id": "ANANDA", 
          "name": "Ananada R", 
          "created": null, 
          "passwd": null, 
          "is_active": true, 
          "id": "6", 
          "project_id": "3", 
          "email": "ananda.r@temp.com"
        }
      ], 
      "iterations": [
        {
          "updated": null, 
          "name": "iteration 007", 
          "created": null, 
          "is_active": true, 
          "project_id": "3", 
          "id": "7"
        }, 
        {
          "updated": null, 
          "name": "iteration 008", 
          "created": null, 
          "is_active": true, 
          "project_id": "3", 
          "id": "8"
        }, 
        {
          "updated": null, 
          "name": "iteration 009", 
          "created": null, 
          "is_active": true, 
          "project_id": "3", 
          "id": "9"
        }
      ], 
      "id": "3", 
      "desc": "Team India"
    }
  ]
}

app.js

(function(){
  window.Scrums = Ember.Application.createWithMixins({
    LOG_TRANSITIONS: true,
    init: function () {
      this.deferReadiness();
      this._super();
    }
  });

  Scrums.Router.map(function () {
    this.resource('projects');
    this.resource('project', {path: '/projects/:project_id'});
    this.resource('iteration', {path: '/iterations/:iteration_id'});
    this.resource('story', {path: '/storys/:story_id'});
    this.resource('task', {path: '/task/:task_id'});
  });

  Scrums.IndexRoute = Ember.Route.extend({
    redirect: function () {
      this.transitionTo('projects');
    }
  });

  Scrums.ProjectsRoute = Ember.Route.extend({
    model: function () {
      return Scrums.Project.find();
    }
  });

  Scrums.advanceReadiness();

})();

index.htm

<script type="text/x-handlebars" data-template-name="application">
    <div class="container">
      {{outlet}}
    </div>
  </script>

  <script type="text/x-handlebars" data-template-name="projects">
    <h1>Projects Template</h1>
    {{#each controller}}
    <div>
      {{#linkTo project this}}{{name}}{{/linkTo}}
    </div>
    {{/each}}
  </script>

  <script type="text/x-handlebars" data-template-name="project">
    <h1>Project Template</h1>
    <span>{{name}}</span>
    {{#each iterations}}
    <div>
      {{#linkTo iteration this}}{{name}}{{/linkTo}}
    </div>
    {{/each}}
  </script>

model.js

Scrums.Store = DS.Store.extend({
    revision: 12,
    adapter: DS.RESTAdapter.create({
     namespace: 'api'
    })
  });

  DS.RESTAdapter.map('Scrums.Project', {
    iterations: { embedded: 'always' },
    persons: { embedded: 'always' }
  });

  Scrums.Project = DS.Model.extend({
    name: DS.attr('string'),
    iterations: DS.hasMany('Scrums.Iteration',{embedded: 'always'}),
    persons: DS.hasMany('Scrums.Person',{embedded: 'always'})
  });

  Scrums.Person = DS.Model.extend({
    name: DS.attr('string'),
    project_id: DS.attr('number'),
    project: DS.belongsTo('Scrums.Project')
  });

  Scrums.Iteration = DS.Model.extend({
    name: DS.attr('string'),
    project_id: DS.attr('number'),
    project: DS.belongsTo('Scrums.Project',{embedded: 'always'}),
    storys: DS.hasMany('Scrums.Story', {embedded: 'always'})
  });