How to specify rootProperty for nested data if it is one level below? - sencha-touch

Question

I am fetching nested data to be shown as nested list but whenever I tap on top level item, it again shows same top level list instead of showing children list and a ajax request is fired to fetch json data again. Here is the store:
Ext.define('MyTabApp.store.CategoriesStore',{
extend:'Ext.data.TreeStore',
config:{
model : 'MyTabApp.model.Category',
autoLoad: false,
storeId : 'categoriesStore',
proxy: {
type: 'ajax',
url: 'resources/data/catTree.json',
reader: {
type: 'json',
rootProperty: 'data.categories'
}
},
listeners:{
load: function( me, records, successful, operation, eOpts ){
console.log("categories tree loaded");
console.log(records);
}
}
}
});
and here is the data in that file which I am using to mock service:
{
"data":{
"categories": [
{
"name": "Men",
"categories": [
{
"name": "Footwear",
"categories": [
{ "name": "Casual Shoes", "leaf": true },
{ "name": "Sports Shoes", "leaf": true }
]
},
{
"name": "Clothing",
"categories": [
{ "name": "Casual Shirts", "leaf": true },
{ "name": "Ethnic", "leaf": true }
]
},
{ "name": "Accessories", "leaf": true }
]
},
{
"name": "Women",
"categories": [
{ "name": "Footwear", "leaf": true },
{ "name": "Clothing", "leaf": true },
{ "name": "Accessories", "leaf": true }
]
},
{
"name": "Kids",
"categories": [
{
"name": "Footwear",
"categories": [
{ "name": "Casual Shoes", "leaf": true },
{ "name": "Sports Shoes", "leaf": true }
]
},
{ "name": "Clothing", "leaf": true }
]
}
]
}
}
This is the list:
Ext.define('MyTabApp.view.CategoriesList', {
extend: 'Ext.dataview.NestedList',
alias : 'widget.categorieslist',
config: {
height : '100%',
title : 'Categories',
displayField : 'name',
useTitleAsBackText : true,
style : 'background-color:#999 !important; font-size:75%',
styleHtmlContent : true,
listConfig: {
itemHeight: 47,
itemTpl : '<div class="nestedlist-item"><div>{name}</div></div>',
height : "100%"
}
},
initialize : function() {
this.callParent();
var me = this;
var catStore = Ext.create('MyTabApp.store.CategoriesStore');
catStore.load();
me.setStore(catStore);
}
});
The list starts working properly without any ajax request on each tap if I remove data wrapper over top categories array and change rootProperty to categories instead of data.categories. Since server is actually returning categories in data object I cannot remove it so how do I fix the store in that case? Also why is that additional ajax request to fetch the file?
[EDIT]
Tried to create a fiddle http://www.senchafiddle.com/#d16kl which is similar but not same because it is using 2.0.1 and data is not loaded from external file or server.

Answer 1

Last time I had this exact situation, it was because one of my top level category was a leaf but I had not set leaf:true. Doing so recalled the top level of the nested list as if it was a child.

Answer 2

It seems from your Fiddle that if your data is in this following format, it would work fine:
{
"categories" : [{
"name" : "Foo",
"categories" : [{
...
}]
}]
}
That is, just remove the "data" property and make defaultRootProperty: 'categories' & rootProperty: 'categories'. Check this: http://www.senchafiddle.com/#d16kl#tIhTp
It works with external data file as well.