Process authenticated flag in json from server before letting Datatables process the response?

stodge

I'm using datatables with Django on the server. I have it all working nicely but one case is causing me grief. If a user logs out from the site in one browser tab (or is logged out due to inactivity) the page using Datatables gives errors. I have a Django view decorator that inserts a flag into the json response indicating if the user is authenticated or not. The javascript in my other pages checks this flag before continuing. But I can't do this with Datatables because I'm using this code to tell the table to update itself:

[code]event_table.fnDraw(true);[/code]

Is there any way to process the json response in my own code before Datatables processes it? Or is there a better way to handle this situation?

Thanks

fbas

when you call fnDraw with bServerSide true, it will call fnServerData. In that function/callback, you can examine the json results before processing the data (DataTables passes in "fnCallback". so if you avert from calling that, you've avoided the draw routine):

put this "fnServerData" function in your initializer
[code]
"fnServerData": function ( sSource, aoData, fnCallback ) {
$.getJSON( sSource, aoData, function (json) {
if ({your criteria in the json in case of error/redirect}) { your code in case of error }
else fnCallback(json);
} );
},
[/code]

see also: http://www.datatables.net/ref#fnServerData

stodge

Awesome - thanks. This worked perfectly.