Flex: Filter XMLListCollection even if test node doesn't exist

I want to show some data from an xml file inside a datagrid, so I do this:

<mx:AdvancedDataGrid id="dgDomains" dataProvider="{new XMLListCollection(xmlDomains..domain(deleted.toString() != '1'))}"
...

and the xml data looks like this:

  <domains>
    <domain>
      <domainName>AGRICULTURE</domainName>
      <deleted>1</deleted>
    </domain>
    <domain>
     开发者_如何学编程 <domainName>IT</domainName>
      <deleted/>
    </domain>
  </domains>

The filter fails if the "deleted" node isn't there. I get this error: Variable deleted is not defined.

Can someone help me improve the filter so that it will work in this case, too?

Thank you!

---

Its fails with error because filter can't apply's on null/undefined variables in your case delete, you may uses XML's elements function it will take care of null/undefined value

xmlDomain..domain.(elements('deleted') != '1')

above statement also return's all nodes in which delete is not defined

Hopes that helps