DataGrid - pass serverQuery for QueryReadStore

[fl0]

DataGrid? offers no reasonable place to set the request.serverQuery object needed by the QueryReadStore? to perform advanced server queries. It was always painful in the past to set the serverQuery via DojoData?. But with the new DataGrid? there is practically no reasonable place left at all. Why not simply make it a property of DataGrid? and pass it within the store.fetch call? Or to add callback extension points in order to manipulate the request before the fetch actually gets executed?

[fl0]

Following extensions would be very handy:
onBeforeFetch: a method where 1) the request can be manipulated (e.g. serverQuery be added) and 2) the request can even be suppressed under some circumstances
onComplete: callback handler for custom processing the results

  ...
  onComplete: function(items, req) {},
  onBeforeFetch: function(req) { return true; },
  ...
  _fetch: function(start, isRender){
    ...
    }else{
      var req = { start: start,
        count: this.rowsPerPage,
	query: this.query,
	sort: this.getSortProps(),
	queryOptions: this.queryOptions,
	isRender: isRender,
	onBegin: dojo.hitch(this, "_onFetchBegin"),
	onComplete: dojo.hitch(this, "_onFetchComplete"),
	onError: dojo.hitch(this, "_onFetchError")
      };
      if (this.onBeforeFetch(req))
        this.store.fetch(req);
    }
    ...
  },
  ...
  _onFetchComplete: function(items, req){
    onComplete(items, req);
    if (items && items.length > 0){
      ...

just a draft, might or might not work, but you get the idea...

[Nathan Toone]

Reassigning to me

[Nathan Toone]

serverQuery is a specific extension to QueryReadStore? - and as such, would require a customized grid widget to support it. No other widget in all of dojo, dijit, or dojox supports serverQuery directly that I can see.

However, you should be able to extend dojox.grid.DataGrid? and replace or override the _fetch function.