jquery-datatable 无数据不显示分页控件

/**
 * This function is called on every 'draw' event, and allows you to
 * dynamically modify any aspect you want about the created DOM.
 *  @type function
 *  @param {object} settings DataTables settings object
 *
 *  @dtopt Callbacks
 *  @name DataTable.defaults.drawCallback
 *
 *  @example
 *    $(document).ready( function() {
 *      $('#example').dataTable( {
 *        "drawCallback": function( settings ) {
 *          alert( 'DataTables has redrawn the table' );
 *        }
 *      } );
 *    } );
 */
"fnDrawCallback": function () {
          if (this.api().page.info().recordsTotal == 0) {
        $('.dataTables_paginate').hide();
    }
    else {
        $('.dataTables_paginate').show();
    }
}