title: How to match strings that contain a string using a filter - Google App Engine
body: <p>In Google App Engine, how do I match strings that contain strings? My datastore contains 'tester' and if I pass in 'est' then tester should be returned.</p>
  
  <pre><code>Filter myFilter =  new FilterPredicate("name",FilterOperator.IN, "est");
  </code></pre>
  
  <p>But I receive this error: <code>A collection of values is required</code></p>
  
  <p>I do not think I am using the filter correctly.</p>