title: OData $filter with items in a $expand
body: <p>I have given some web services to access informations. </p>
  
  <p>The first thing that i have tries to expand a node . And i have done that successfully with following code</p>
  
  <pre><code>http://www.domain.com/ODataService/WorkService.svc/CaseStudies?format=json&amp;$expand=ServiceOfferings
  </code></pre>
  
  <p>Now i want to filter ServiceOfferingID that i will get when expanding ServiceOfferings .
  How can use filter option against a expanded collection</p>
  
  <pre><code>http://www.domain.com/ODataService/WorkService.svc/CaseStudies?format=json&amp;$expand=ServiceOfferings&amp;$filter=ServiceOfferings.ServiceOfferingID eq 127 
  </code></pre>
  
  <p>But its not working. What is right way to do the same</p>