title: unique constraints-Google app engine
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2626978/unique-constraint-at-data-level-in-gae">Unique Constraint At Data Level in GAE</a>  </p>
  </blockquote>
  
  
  
  <p>Does the Google App engine datastore support unique constraints?</p>