title: Add value to extjs textarea from store
body: <p>I want to get data from mongo data base and add it to an extjs text area.</p>
  
  <p>Everything is ready, my mongo data base returns a list of user email addresses that I want to add to the extjs text area.</p>
  
  <p>I use this code:</p>
  
  <pre><code>var index = Ext.StoreMgr.lookup("writeup.store.Employee").findExact('name',name);
  var rec = Ext.StoreMgr.lookup("writeup.store.Employee").getAt(index);
  alert(rec.data.name);
  </code></pre>
  
  <p>But I get this error:</p>
  
  <pre><code>TypeError: Ext.StoreMgr.lookup(...) is undefined
  </code></pre>
  
  <p>And this is my store</p>
  
  <pre><code>Ext.define('writeup.store.Employee', {
  extend: 'Ext.data.Store',
  model: 'writeup.model.Employee',
  autoLoad: true,
  
  proxy: {
      type: 'ajax',
      actionMethods: {
          read   : 'POST'
      },
      api: {
          read : 'user/view.action'
      },
      reader: {
          type: 'json',
          root: 'data',
          successProperty: 'success'
      },
      writer: {
          type: 'json',
          writeAllFields: true,
          encode: false,
          root: 'employee'
  
      },
      listeners: {
          exception: function(proxy, response, operation){
              Ext.MessageBox.show({
                  title: 'REMOTE EXCEPTION',
                  msg: operation.getError(),
                  icon: Ext.MessageBox.ERROR,
                  buttons: Ext.Msg.OK
              });
          }
      }
  }
  });
  </code></pre>