title: Django Union Query
body: <p>I need to develop a UNION query in Django with 3 models namely WebQuery,WebReply and BusinessOwners and the output should be of the form below.</p>
  
  <pre><code>{
      "(#conversation_id#)_(#b_id#)": {
          "from": "(#user_id)",
          "email": "(#user_email)",
          "date_time": "#get from db",
          "query": "are you open ?",
          "from_r_id": "(#representative_id)",
          "from_r_name": "(#rep_name)",
          "business_registered": "FALSE"
          "to_business_name": "CCD saket",
          "chat": [{
              "direction": 1,
              "text": "yes sir",
              "date_time": "424 577"
          }, {
              "direction": 0,
              "text": "ok",
              "date_time": "424 577"
          }]
      },
  </code></pre>
  
  <p>I know how to query when only one model is involved, but not sure of the union query.
  How will this be achieved?</p>