Ext.data.StoreTest.js

function test() {
	var rec = Ext.data.Record.create([
		{name: 'id', type: 'string'}
	]);

	var store = new Ext.data.JsonStore({
		autoSave: true,

		proxy: new Ext.data.HttpProxy({
			url: 'test',
			defaultHeaders: {
				'Content-Type': 'application/json; charset=UTF-8'
			},
			method: 'POST'
	    }),

		reader: new Ext.data.JsonReader(
			{
				idProperty: 'id',
				root: 'result',
				successProperty: 'success'
			},
			rec
		),

		writer: new Ext.data.JsonWriter({
			encode: false,
			encodeDelete: true,
			writeAllFields: true
		})
	});

	store.add(
		new rec({
			id: 'myId'
		})
	);
};

// ExtJS 3.2.x POST data: {"undefined":{"id":"myId"}}
// ExtJS 3.3.x POST data: {"undefined":[{"id":"myId"},{"id":"myId"}]}

gistfile2.txt