title: Succinct way of updating a single field of a django model object
body: <p>To update (and save) the field on an object you do:</p>
  
  <pre><code>&gt;&gt;&gt; product = Product.objects.get(name='Venezuelan Beaver Cheese')
  &gt;&gt;&gt; product.number_sold = 4
  &gt;&gt;&gt; product.save()
  </code></pre>
  
  <p>Is there a way to compress the last two lines into a single line, like:</p>
  
  <pre><code>product.update(number_sold=4)
  </code></pre>