ExtJS, SenchaTouch - FormPanel can't load values from a store?

How do you load values into a formpanel from a store? I've built an entire broken example here.

I'm not sure why my form fields aren't loaded.

The model:

Ext.ns('app', 'app.defaults');
        Ext.regModel('MyModel', {
            fields: [
                {name: 'var1', type: 'integer'}
            ]
        });
        app.defaults.vars = {
            var1: 5
        };

The store:

 var myStore = new Ext.data.Store({
                    model: 'MyModel',
                    proxy: {
                        type: 'localstorage',
                        id: 'model-proxy'
                    },
                    listeners: {
                        load: function(store, records, successful) {
                            if (this.getCount() > 1) {
                                alert('Error: More than one record is impossible.');
                                this.proxy.clear();
                            }
                            if (this.getCount() == 0) {
                                alert( "Count 0, loading defaults");
                                this.add(app.defaults.vars);
                                this.sync();
                            }

                            console.log("Attempting to l开发者_如何学JAVAoad store");
                            myForm.load(this);
                        }
                    },
                    autoLoad: true,
                    autoSave: true
                });

The form:

var myForm = new Ext.form.FormPanel({
                    id: 'my-form',
                    scroll: 'vertical',
                    items: [
                        {
                            xtype: 'fieldset',
                            defaults: {
                                labelWidth: '35%'
                            },
                            items: [
                                {
                                    xtype: 'numberfield',
                                    id: 'var1',
                                    name: 'var1',
                                label: 'Var1',
                                placeHolder: '100',
                                useClearIcon: true
                            }
                        ]
                    }
                ]
            });

I found other way to connect formpanel with the data After the form is loaded insert following code

  myForm.getForm().loadRecord(Ext.ModelManager.create({
                        'var1':5
                    }, 'MyModel'));

So, then, load a record instead of the store. Load records[0] instead of this.