Unable to sort Dgrid - json

Question

var CustomGrid = declare([Grid, Keyboard, Selection]);
var questionGrid = new CustomGrid({
store: questionCacheStore,
columns: [
editor({
label: "Questions",
field: "question",
editor: "text",
editOn: "dblclick",
sortable:true})
],
selectionMode: "single",
cellNavigation: false
}, "questions");
I am new to Dgrid. So, please do bear with me .
i was able to populate the dgrid with a JsonStore content. But when i click on the column 'Questions', it doesn't get sorted as in local data store.instead it shows an error Uncaught TypeError: Object [object Object] has no method 'sort'. Is it required to define such a method . If so, how and where should i define it ?

Answer 1

I am not the person to answer your J2EE question. I asked that question recently. The solution that I found was to inject the HttpServletRequest directly. This allowed me access to the query string parameters. From there I was able to get the sort direction (ascending, descending) and column to sort. Hopefully the snippets below will help.
Example Grid Setup
require(["dojo/store/JsonRest", "dojo/store/Memory", "dojo/store/Cache",
"dojo/store/Observable", "dgrid/OnDemandGrid", "dojo/_base/declare", "dgrid/Keyboard",
"dgrid/Selection", "dojo/domReady!"],
function(JsonRest, Memory, Cache, Observable, Grid, declare, Keyboard, Selection) {
var rest = new JsonRest({target:"/POC_Admin/rest/Subcategory/", idProperty: "subcatId"});
var cache = new Cache(rest, new Memory({ idProperty: "subcatId" }));
var store = new Observable(cache);
var CustomGrid = declare([ Grid, Keyboard, Selection ]);
var grid = new CustomGrid({
columns: {
subcatId: "ID",
name: "Name"
},
store: store
}, "grid");
grid.on("dgrid-select", function(event){
// Report the item from the selected row to the console.
console.log("Row selected: ", event.rows[0].data);
});
grid.startup();
});
Example Rest GET
#Context private HttpServletRequest servletRequest;
#GET
#Path("")
#Produces(MediaType.APPLICATION_JSON + ";charset=UTF-8")
public String getSubcategories(#QueryParam("name") String name) throws IOException {
//Respond to a QueryString value.
if (servletRequest.getQueryString() != null && servletRequest.getQueryString().length() > 0) {
String querystringKey = servletRequest.getQueryString();
System.out.println("QSKey = " + querystringKey);
System.out.println("Substr: " + querystringKey.substring(0, 4));
if (querystringKey.length()>4) {
if (querystringKey.substring(0, 4).contains("sort")) {
//We have the sort request.
}
}
}
//Return all results otherwise from your DAO at this point
}