Extjs tree not able to load nested object - object

Question

I have a class called Zone1s in java which has 2 fields text(name of zone) and list of Zone1s.
when i convert it to json i get following response :
{"text":"Papa","Zone1s":[{"text":"Beta1","Zone1s":[{"text":"BetaBeta1","Zone1s":[]},{"text":"BetaBeta2","Zone1s":[]}]},{"text":"Beta2","Zone1s":[]}]}
i wrote a Extjs model,store and panel below:
Ext.define('Zone1s', {
extend: 'Ext.data.Model',
fields: [
{ name: 'text', type: 'string' }
],
proxy: {
type: 'ajax',
url : 'test.htm',
reader: {
type : 'json',
record: 'Zone1s'
}
},
hasMany: {model: 'Zone1s', name: 'Zone1s'},
belongsTo: 'Zone1s'
});
var store =Ext.create('Ext.data.Store', {
model: 'Zone1s',
autoLoad: true
});
Ext.create('Ext.tree.Panel', {
title: 'Simple Tree',
width: 200,
height: 150,
store: store,
renderTo: Ext.getBody()
});
i am getting following error:
me.store.getRootNode is not a function...
Can anyone please Guide me where i am wrong ?
i have gone through
How do I show nested data into a tree?
but here my Zone1s can have Zone1s in themselves that's the difference.

Answer 1

You should add a root attribute to your Store :
var store =Ext.create('Ext.data.Store', {
model: 'Zone1s',
autoLoad: true,
root: {
text: 'Zone1s',
id: 'Zone1s',
expanded: true
}
});
If you do not want to see the root node, use the rootVisible attribute :
Ext.create('Ext.tree.Panel', {
title: 'Simple Tree',
width: 200,
height: 150,
store: store,
rootVisible : false,
renderTo: Ext.getBody()
});