title: can serializers.serialize consolidate/concatenate more than one object of different types
body: <p>I have a person and company classes in my models.py</p>
  
  <p>In the view I'm doing the following:</p>
  
  <pre><code>company = company.objects.filter(company_id=compid)
  user = person.objects.filter(person_id=company[0].manager_id)
  </code></pre>
  
  <p>I wish to enter all the fields of company and user into one output and return the result like so:</p>
  
  <pre><code>output = serializers.serialize('json',[company,user], fields=('company_id', 'company_name', 'user_id', 'user_name'))
  return HttpResponse(output, content_type="application/json")
  </code></pre>
  
  <p>how can this result be accomplished?</p>