title: YADCF multi_select filter with server side
body: <p>Working with AngularJS, I have a DataTable() working in serverSide mode, using the YADCF filters.
  Is it possible to use the <code>multi_select</code> filter (whith chosen or select2) while working on ServerSide? Can I manually introduce the parameters of search? In this case I want to use that filter on the column #6 ("estado") that means "The state" of a proccess.</p>
  
  <p>The code from the <code>myApp.controller</code></p>
  
  <pre><code>var table = $('#tbl').DataTable({
          stateSave: true,
          stateDuration: -1,
          //sRowSelect: "multi",
          language: sharedProperties.getLanguageDatatable(),
          dom: '&lt;"toolbar"&gt;T&lt;"clear"&gt;lfrtip',            
          "columnDefs": [
              { "data": "processosId", "targets": 0, "visible": false, "searchable": false },
              { "data": "utilizadoresId", "targets": 1, "visible": false, "searchable": false },
              { "data": "entidadesId", "targets": 2, "visible": false, "searchable": false },
              { "data": "numero", "targets": 3 },
              { "data": "nomeEntidade", "targets": 4, "visible":entidadeCol },
              { "data": "nomeUtilizador", "targets": 5, "visible":utilizadorCol },
              { "data": "estado", "targets": 6 },                
          ],
          serverSide: true,
          ajax: {
              "url": urlProcessos,
              "error": function (reason) {
                  if (reason.status == 401) { // Not Authorized
                      self.location = '#/logout';
                  }
              }
          },
  });
  
      yadcf.init(table,
      [
          { column_number: 3, filter_type: 'text', filter_default_label: "" },
          { column_number: 4, filter_type: 'text', filter_default_label: "" },
          { column_number: 5, filter_type: 'text', filter_default_label: "" },
          { column_number: 6, filter_type: 'multi_select', filter_default_label: "", select_type:'chosen' },            
      ]);
  
      $scope.newProcess = function () {            
          table.columns(6).search('Novo').draw();
  
      }
  
      $scope.openProcess = function () {
          table.columns(6).search('Aberto').draw();
      }
  </code></pre>
  
  <p>When I filter the first time, because its server-side it only have access to the proccess with that state, so it's impossible to chose one or more states...</p>