title: using properties in Django Admin
body: <p>I have a model with field defined as</p>
  
  <pre><code>p = models.DecimalField(max_digits=12, decimal_places=6)
  </code></pre>
  
  <p>But the decimal_places=6 is only for internal accuracy. I only want 2 decimal_places to show up in the admin fields. So I thought perhaps I could do something with properties. But properties don't show up as fields in the Admin interface. E.g.: database record: 100.256754
  admin edit field shows: 100.26</p>
  
  <p>Is there a way to do this?</p>