title: Google App Engine Incremental Identifier (ID)
body: <p>I'm building a software for a school hosted at GAE and I need to create and sequence identifier to a new student when created, it doesn't really need to be the "key", but need this number to be incremented by one, each time a new student is added, it's gonna be the student number printed at the school card.</p>
  
  <p>Using the <a href="http://code.google.com/appengine/docs/java/javadoc/index.html" rel="nofollow">low level API</a>, I'm doing this:</p>
  
  <pre><code>student = new Entity("student")
  student &lt;&lt; params.subMap(["name", "birthdate"])
  student.save()
  </code></pre>
  
  <p>It's creating the ID but it not been increment by one, it is kind of random...</p>
  
  <p>I also tried to understand the KeyRange, but got nothing out of it.</p>
  
  <p>Some help?</p>