Added function getEidi which returns the part of the id of an item which needs to be appended to the store base URL for PUT and DELETE and GET Requests. This function is used to build a custom id. On default it returns the value of getId.

Ext.define('Lada.store.Orte', {
    extend: 'Ext.data.Store',
    model: 'Lada.model.Ort'
});