controller do
  def index
    redirect_to manage_admin_pay_records_path
  end
end

collection_action :manage do
end

collection_action :json do
  page = params[:page].to_i
  rows = params[:rows].to_i
  records = PayRecord.all.count
  total = (records.to_f / rows.to_f).ceil
  @pay_records = PayRecord.page(page).per(rows)
  result = {
   "total" => total,
   "page" => page,
   "records" => records,
   "rows" => @pay_records
  }
  render :json => result
end

<table id="list2"></table> <div id="pager2"></div>
 <script>
 $("#list2").jqGrid({
   url : '/admin/pay_records/json',
   datatype : "json",
   colNames : [ 'id'],
   colModel : [
      {name : 'id', index : 'id',width : 5}
   ],
   rowNum : 10,
   autowidth : true,
   height : 'auto',
   pager : '#pager2',
   sortname : 'id',
   viewrecords : true,
   sortorder : "desc",
   caption : "Pay Records",
   emptyrecords : "Empty Records"
 });

 $("#list2").jqGrid('navGrid',"#pager2",{ pdf : true, edit : false, add :   false, del : false, search : true }, {}, {}, {}, { sopt : [ 'eq', 'ne', 'lt', 'gt', 'cn', 'bw', 'ew' ],
    closeOnEscape : true,
    multipleSearch : true,
    closeAfterSearch : true
 });
</script>