How can I tell if statesave page no longer exists?

kvothe

My table:

    var dataTables=$('.pagedTable').DataTable({
        "processing": true
            ,"serverSide": true
            ,"stateSave":true
            ,"stateDuration": 60 * 60 * 24
        ,"ajax": {
                "url":url
                ,"type":"post"
            }
        ,"columns":[
                     {"data":"id","defaultContent":"0"}, etc

My code to clear state:

    if(page doesn't exist){
          dataTables.state.clear();
          dataTables.draw()
    }

I don't know how to tell if the page doesn't exist. I've tried dataTables.page.info() but the data it shows is the same whether my page has data or not.

kvothe

After SO MUCH trial and error, I finally succeeded with this code:

,"fnDrawCallback":function(){
    if(dataTables.row().data()===undefined){
        dataTables.state.clear();
        location.href=url
    }
}