Answers

• allan Posts: 63,350Questions: 1Answers: 10,443 Site admin

  November 2016

  You can't. If the server returns no data, there is no data for the table to display .

  What you would need to do is make your own Ajax call to get the data, then use clear() and rows.add() to first clear out the old data and then add the new rows. You could add a logic check around that to check that there is actually data to display.

  Allan
• TheFreeman Posts: 4Questions: 1Answers: 0

  November 2016

  :-) No, the server returns Data, but there is no table-data.
  Because i check on the server, if the data ´has changed.
  If not, there is no data to send.

  Is there no way to use the DT api to solve the porblem?
• TheFreeman Posts: 4Questions: 1Answers: 0

  November 2016

  Why is the reload-callback not fired?
• allan Posts: 63,350Questions: 1Answers: 10,443 Site admin

  November 2016

  No - you need to make your own Ajax call and use the API methods I mentioned above if the server doesn't return any data to be displayed in the table. Its just three or four lines rather than a single API call .

  Why is the reload-callback not fired?

  It should be: example.

  Allan
• TheFreeman Posts: 4Questions: 1Answers: 0

  November 2016

  Hi Allan.
  Thank you so much for your great support.
  I made me a proper solution with an extern call:

  /**
      Checks received data from api, if the included version number 
      equals the current. If not, the table-data object is cleared
      and new data is added. After that the table is redrawed.
      
      Parameters:
          @json   [JSON-DATA] from api call
  */
  function list_check_reloaded_data(json)
  {
      if( global_datatable_version == json.data.version )
          return;
      
      var list = json.data.cells;
      
      if( list.length === 0 )
          return;
      
      global_datatable_version = json.data.version;
      global_datatable_data = json.data;
      
      global_datatable_obj.clear();
      global_datatable_obj.rows.add(list);
      global_datatable_obj.draw();
  }
  
  
  // List data auto reload
      setInterval( function()
      {
          var url = global_datatable_ajax_url + "?version=" + global_datatable_version;
          api_call(url, list_check_reloaded_data);
      }, global_common_config.list.reload_interval );
  

  That works for me
• allan Posts: 63,350Questions: 1Answers: 10,443 Site admin

  November 2016

  Perfect - nice one!

  Allan