title: Prevent duplicate entries parse.com
body: <p>I'm using Parse.com as my backend and while there seems to be a method, <code>saveInBackgroundWithBlock</code>, to prevent duplicate entries. It doesn't appear to exist on Android. I'd like to upload only unique entries but can't figure out a way to do so. </p>
  
  <p>The only thing I can think of is to query then insert if the entry doesn't exist, but that's doing twice as many network calls and I feel like it needs to.</p>
  
  <p>Thanks  </p>