treepanel requerying proxy when expanding children

[strattonbrazil]

I have a TreeStore that feeds into a TreePanel using a json proxy, but it requeries the server when I try to expand root children even though the entire tree has been sent I understand the reasoning for lazy loading parts of the tree, but is there a way to just fill it in one pass with queries expanding child nodes?

Here's a snippet of my TreeStore and my TreePanel. Like I said, the root children come in fine, but the proxy url gets requeried when I try to expand a child node.

       var filesStore = new Ext.data.TreeStore({
                            proxy: {
                                type: 'ajax',
                                url: 'files',
                                reader: {
                                type: 'json',
                                root: 'files',
                                },
                                extraParams : {
                                uri: data['uri'],
                                msg: 'request for files'
                                }, 
                            },
                            autoLoad: true,
                            fields: [
                                'name',
                                'type',
                                'size',
                            ],
                            });


...

                                         xtype: 'treepanel',
                                         rootVisible: false,
                                         store: filesStore,
                                         autoSizeColumns: true,
                                         columns: [
                                         { xtype: 'treecolumn', text: 'File/Directory', dataIndex: 'name', flex: 6 },
                                         { text: 'Type', dataIndex: 'type', flex: 1 },
flex: 2 },
                                         { text: 'Size (b)', dataIndex: 'size', flex: 1 },
},

I have data in the nodes' children attribute, so I figured it would use that instead of querying again.

[mitchellsimoens]

It should only be trying to load the children if there are no children present. What Ext JS 4 version are you using?