title: Django append query results to query set
body: <p>in a view I am constructing I need to consult multiple databases. What I want to do is use the results of on query_set to search another db table.</p>
  
  <p>I have functioning <strong>mydb1_query_set</strong>, what I need now is something like this:</p>
  
  <pre><code>for row in mydb1_query_set:
          mydb2_query_set = Mytable.objects.filter(id=row.id)
  </code></pre>
  
  <p>So that I keep adding to the initially empty <strong>mydb2_query_set</strong> as I iterate. I realize that there is no <code>QuerySet.append</code>, so how do I achieve what I want? Any help much appreciated...</p>