錯誤處理:
onSaveUserEdit: function(btn, event) {
var me = this,
form = btn.up('form').getForm(),
errors = form.updateRecord(form.getRecord()).getRecord().validate(); // voodoo!
if(errors.isValid()) {
// form is valid
form.submit(/** custom form submit action object **/);
} else {
form.markInvalid(errors);
}
}