[1.2 Beta] json TreeStore undefined records loaded

[ofueckert]

Hi,

I am trying to populate a Tree View Panel using a jsonTreeStore store.
I always get an "undefined records loaded" message when I try to load the store with my sample data.

Somehow, I just can't spot what I am doing wrong. Here the json raw data returned by the service:

{"root":{"text":"My Root","children":[{"text":"Child 1","leaf":true},{"text":"Child 2","leaf":true}]}}

A standard json store loads fine with this data.

Here the source of the TreeStore object:

Ext.define('deviceTreeStoreUi', {
    extend: 'Ext.data.TreeStore',

    constructor: function(cfg) {
        var me = this;
        cfg = cfg || {};
        me.callParent([Ext.apply({
            autoLoad: true,
            storeId: 'deviceTreeStore',
            proxy: {
                type: 'ajax',
                url: 'tree.php',
                reader: {
                    type: 'json'
                }
            }
        }, cfg)]);
    }
});

Anybody spotting any mistakes or is it possibly a 1.2 beta issue ?

best regards,

Oliver.

[Phil.Strong]

Ok so I believe the the tree is giving itself a root and thus you can't describe it in your json.

Change your json returned to:

[{"text":"Designer","leaf":true},
{"text":"1.2","leaf":true},
{"text":"is awesome!","leaf":true}]

You found 2 bugs:
bug 1. Ext.data.TreeStore doesn't have an autoLoad (we'll remove it). FYI I believe it should have this.

bug 2. When loading the records from designer on a tree store 'undefined records loaded' was reported. I've fixed this and on the next build it will simply read 'records loaded'. I could cascade the tree to discover the number of records but I worry about monster sized data sets.

Thanks for your help. With the above change you should be able to get going. In preview and on export I had to call MyJsonTreeStore.load() to get it to load properly.

You can also (export) add

root: {
            text: 'Me root',
            id: 'src',
            expanded: true
        }

see this example and it's code

[ofueckert]

Thanks Phil!

Just out of interest:
Thanks for your help. With the above change you should be able to get going. In preview and on export I had to call MyJsonTreeStore.load() to get it to load properly.

How do you call a function in preview ?

Ollie.

[Phil.Strong]

Your right can't do this in preview!

[sssml2011]

Shouldn't we be able to specify a root object in a TreeStore through Designer? Manually altering the generated store script to specify the root object in the TreeStore was the only way I could get the JSON data to load with rootVisible=true. Given that when you export the store from Designer it gets overwritten, it seems that Designer should allow a root object to be specified.