infinite scroll not rendering - extjs

Question

I'm trying to use ExtJS4.1 infinite scroll feature.
The ajax calls are being made, the data returned, but only the first page loads.
What am I doing wrong? When I scroll down nothing happens.
My code:
Store:
Ext.define('BM.store.Tests', {
extend: 'Ext.data.Store',
model: 'BM.model.Test',
storeId: 'Tests',
buffered: true,
leadingBufferZone: 50,
pageSize: 25,
purgePageCount: 0,
autoLoad: true
});
The proxy is in the model:
proxy: {
type: 'ajax',
api: {
create: '../webapp/tests/create',
read: '../webapp/tests',
update: '../webapp/tests/update'
},
reader: {
type: 'json',
root: 'tests',
successProperty: 'success'
}
}
The grid:
Ext.define('BM.view.test.MacroList', {
extend: 'Ext.grid.Panel',
alias:'widget.macro-test-list',
store: 'Tests',
// loadMask: true,
// selModel: {
// pruneRemoved: false
// },
// viewConfig: {
// trackOver: false
// },
verticalScroller: {
numFromEdge: 5,
trailingBufferZone: 10,
leadingBufferZone: 20
},
initComponent: function() {
this.columns = [
{
xtype: 'gridcolumn',
dataIndex: 'name',
text: 'Name'
},
{
xtype: 'datecolumn',
dataIndex: 'created',
text: 'Date Created',
format: 'd-M-Y'
},
{
xtype: 'datecolumn',
dataIndex: 'changed',
text: 'Last Updated',
format: 'd-M-Y'
}
];
this.callParent(arguments);
}
The only thing that's different between my implementation and the one in the examples, is that my grid is not rendered to the body.
The viewport contains a border layout.
The grid is part of the west region panel:
{
collapsible: true,
region: 'west',
xtype: 'macro',
width: 500
}
The macro panel:
Ext.define('BM.view.Macro', {
extend: 'Ext.panel.Panel',
alias: 'widget.macro',
title: 'Tests',
layout: {
type: 'vbox',
align: 'stretch'
},
items: [
{
id: "macro-test-list-id",
xtype: 'macro-test-list',
flex: 1
},
{
id: "macro-report-panel-id",
xtype: 'macro-report-list',
title: false,
flex: 1
},
{
id: "macro-report-list-id-all",
xtype: 'macro-report-list-all',
flex: 1,
hidden: true,
layout: 'anchor'
}
]
});
I've tried many many things, changing layouts, giving the grid a fixed height, etc...
Nothing works, scroll down, and the grid doesn't refresh.
One other piece of information: The DB contains 53 records of data. I'm getting the 3 ajax calls, but only the first 25 records appear (as I requested).
Any thoughts?

Answer 1

It sounds like you might be forgetting to put the total property in the server's JSON response. Does your answer have a structure like this:
{
"total": 53,
"tests": [(...)]
}
The totalProperty name is defined in the Reader configuration and defaults to total.
http://docs.sencha.com/ext-js/4-1/#!/api/Ext.data.reader.Reader-cfg-totalProperty

Answer 2

You need to upgrade to ExtJS 4.2!