title: DT_Row_Index not found in Yajra Datatable
body: <p>I am using Yajra Datatables, this is my php code</p>
  
  <pre><code>$quotes=User::find($id)-&gt;quotes();
          return Datatables::of($quotes)
              -&gt;addIndexColumn()
              -&gt;setRowClass(function($quote){
                  return $quote-&gt;quote_urgent?"table-primary":"";
              })
              -&gt;addColumn("convert","Convert")
              -&gt;addColumn("action",function($quote){
                  return "&lt;a href='".URL::to("customer/".$quote-&gt;quote_customer_id."/view-quote/".$quote-&gt;quote_id)."'&gt;Details&lt;/a&gt;";
              })
              -&gt;make(true);
  </code></pre>
  
  <p>and my javascript is </p>
  
  <pre><code>$(document).ready(function() {
                      $('.datatable').DataTable({
                          processing: true,
                          serverSide: true,
                          buttons:[
                              {extend:'paginate_button',className:'btn btn-primary'}
                          ],
                          pageLength:4000,
                          ajax: '{{ route('CustomerQuoteRecords',$customer-&gt;id) }}',
                          columns:[
                              {"data":"DT_Row_Index"},
                              {"data":"quote_id"},
                              {"data":"created_at"},
                              {"data":"quote_received","defaultContent":"-"},
                              {"data":"quote_name"},
                              {"data":"quote_price"},
                              {"data":"convert"},
                              {"data":"action"},
                          ]
                      });
                  });
  </code></pre>
  
  <p>The above code gives error of DT_Row_Index column not found because by default first column have order applied, as we know addIndexColumn adds extra data to the returned JSON but DT_Row_Index is not present in the database table.</p>
  
  <p>But when I change it to this, it works correctly.</p>
  
  <pre><code>columns:[
                              {"data":"quote_id"},
                              {"data":"DT_Row_Index"},
                              {"data":"created_at"},
                              {"data":"quote_received","defaultContent":"-"},
                              {"data":"quote_name"},
                              {"data":"quote_price"},
                              {"data":"convert"},
                              {"data":"action"},
                          ]
  </code></pre>
  
  <p>But I need DT_Row_Index in first column.</p>