Ember JS Relationships Not updating

item.js

import DS from 'ember-data';

export default DS.Model.extend({
  item_no: DS.attr('string'),
  name: DS.attr('string'),
  notes: DS.attr('string'),
  barcode: DS.attr('string'),
  vendor_item_no: DS.attr('string'),
  vendor_dept: DS.attr('string'),
  orders: DS.hasMany('order', {async: true}),
  search_name: Ember.computed('item_no', 'name', function() {
    return this.get('item_no') + ' - ' + this.get('name');
  })
});

order.js

import DS from 'ember-data';
import Ember from 'ember';

export default DS.Model.extend({
  requested_qty: DS.attr('number'),
  notes: DS.attr('string'),
  due_date: DS.attr('date'),
  job: DS.belongsTo('job', {async: true}),
  item: DS.belongsTo('item', {async: true}),
  status: DS.attr('string', {defaultValue: 'Open'}),
  createdAt: DS.attr('date', {
    defaultValue() { return new Date(); }
  }),
  order_no: Ember.computed('id', {
    get() {
      let order_no = parseInt(this.get('id')) + 10000;
      return order_no;
    }
  })
});

template.hbs

<h1>Work Orders</h1>
<table class="table table-hover table-responsive">
  <thead>
    <tr>
      <th>Order No.</th>
      <th>Job No.</th>
      <th>Item No.</th>
      <th>Quantity</th>
      <th>Status</th>
      <th>Due Date</th>
      <th>Actions</th>
    </tr>
  </thead>
  <tbody>
    {{#each model as |order|}}
      <tr>
        <td>{{link-to order.order_no 'orders.show' order}}</td>
        <td>{{link-to order.job.ref_no 'jobs.show' order.job}} - {{order.job.creator.name}}</td>
        <td>{{order.item.item_no}}</td>
        <td>{{order.requested_qty}}</td>
        <td>{{order.status}}</td>
        <td>{{order.due_date}}</td>
        <td>{{link-to 'Edit' 'orders.edit' order}}</td>
      </tr>
    {{/each}}
  </tbody>
</table>