title: Django OR query using Extra and Filter
body: <p>I am trying to use Django's ORM to generate a query using both extra and filter methods. Something like this: </p>
  
  <pre><code>Model.objects.filter(clauseA).extra(clauseB).all()
  </code></pre>
  
  <p>This generates a query, but the issue is that everything in the filter clause is AND'd with everything in the extra clause, so the sql looks like: </p>
  
  <pre><code>SELECT * FROM model WHERE clauseA AND clauseB. 
  </code></pre>
  
  <p>My question is, is there a way to change the default combination operator for a query in Django such that the query generated will be:</p>
  
  <pre><code>SELECT * FROM model WHERE clauseA OR clauseB. 
  </code></pre>