title: How to set default value of integer field to id() in app engine?
body: <p>Is it possible to set default value of field in data model to id() of the data model?</p>
  
  <p>something like </p>
  
  <pre><code>class MyModel(db.Model):
      myID = db.IntegerProperty(default=self.id())
      desc = db.StringProperty()
  </code></pre>