title: Selecting/Querying objects from django bulk_create?
body: <p>If I use bulk_create to insert objects:</p>
  
  <pre><code>objList = [a, b, c,] #none are saved
  model.objects.bulk_create(objList)
  </code></pre>
  
  <p>The id's of the objects would not be updated (see <a href="https://docs.djangoproject.com/en/dev/ref/models/querysets/#bulk-create" rel="nofollow">https://docs.djangoproject.com/en/dev/ref/models/querysets/#bulk-create</a>). 
  So I can't use these guys as foreign key objects.  I thought of querying them back from the database after they're bulk created and then using them as foreign key objects, but I don't have their ids to query them.  How do I query these objects from the database (given that there can be duplicate values in columns other than the id)? Or is there a better way to make bulk created items as foreign keys?</p>