title: ExtJS 4 Show data from multiple stores in grid
body: <p>I have 2 models - for example - Users and Orders</p>
  
  <pre><code>Ext.define('AM.model.User', {
      extend: 'Ext.data.Model',
      fields: ['id', 'username', 'firstName', 'lastName', 'state', 'city'],
  
      associations: [
      {
              type: 'hasMany', 
              model: 'Order', 
              name: 'orders'
      },],        
  });
  
  Ext.define('AM.model.Order', {
      extend: 'Ext.data.Model',
      fields: ['id', 'userId', 'date', 'description', 'value'],    
      belongsTo: 'User',   
  });
  </code></pre>
  
  <p>and their stores. I'm looking for a way to display data from both stores in grid. (so my columns would be <code>firstName</code>, <code>lastName</code>, <code>orderDate</code>, <code>orderDescription</code>, <code>orderValue</code>...</p>
  
  <p>What is the proper way to display them?</p>
  
  <p>Thanks.</p>