I faced a similar situation 1 hour ago, i needed to edit data during loading or immidiatly after. I ended with this solution:
Ext.define('TestApp.store.MyStore', {
extend: 'Ext.data.Store',
requires: ['TestApp.model.SecretKeyModel'],
config :{
model: 'TestApp.model.SecretKeyModel',
proxy: {
type: 'ajax',
url: TestApp.utils.GlobalVariables.getServerUrl(),
reader: {
type: 'json',
rootProperty: ''
}
},
listeners: {
refresh: function(store, data, eOpts) {
store.each(function (item, index, length) {
item.extractToken(); // call this on every record loaded in the store
});
}
}
}
});