title: Do I need to wrap a django update in a transaction?
body: <p>Suppose I am running an update of several model objects in django:</p>
  
  <pre><code>SomeModel.objects.filter(name="abc").update(name="xyz")
  </code></pre>
  
  <p>Do I need to wrap this in <code>transaction.atomic</code>? Is there anything bad that will happen if I don't?</p>