Stop overwriting data in store

[Sasha172]

Hi,
My app is a list of ToDo's of forms that need to be completed.

1. When the app is opened, it goes to the server and collects (from a database) a list of forms to be completed.
2. When you click on a form you can then fill in the data (using LocalStorage proxy) and then save/update the data. The data is stored locally on the device.

As of now : When I open the app again, it collects the same list of ToDo's and overwrites the data in the LocalStorage (ie my filled up forms) with new empty forms and therefore I need to fill them again.

What I want : Instead of overwriting filled up forms I need to only collect those forms that are not already in my localstorage.

My Code :
Store :-

FMS.stores.onlineTodo =  new Ext.data.Store({
    model: 'ToDoMod',
    proxy: {
        id : 'fmsonlinetodo',
        type: 'ajax',
        url: 'app/data/dummydata.json',
        reader: new Ext.data.JsonReader({
            root: 'items'
        }),
        timeout: 2000,
        listeners: {
            exception:function () {
                console.log("I think we are offline");
                flagoffline = 1;
//              
            }
        }
    }
});

FMS.stores.offlineTodo = new Ext.data.Store({
    model : 'ToDoMod',
    proxy : {
        type : 'localstorage',
        id : 'fmsofflinetodo'
    }
});

Controller function that loads data into store :

loadDataInitial : function(){
        
        FMS.stores.onlineTodo.addListener('load', function () {
            console.log("I think we are online");
            FMS.stores.offlineTodo.proxy.clear();
            FMS.stores.onlineTodo.each(function (record) {                         
                  FMS.stores.offlineTodo.add(record.data)[0];
            });
            FMS.stores.offlineTodo.sync();
            FMS.stores.offlineTodo.load();
            flagoffline = 0;
        });
        
        if(flagoffline == 0){
            FMS.stores.onlineTodo.load();
        }
        else{
            FMS.stores.offlineTodo.load();
        }


    },

HELP !!!!!

[gilles86]

First load the offline Store and if there is no data in there you should load the onlineStore.
Here are some hints:

FMS.stores.offlineTodo = new Ext.data.Store({    model : 'ToDoMod',    proxy : {        type : 'localstorage',        id : 'fmsofflinetodo'    },    autoLoad: false});

// After load of onlineTodo
if(
FMS.stores.onlineTodo.data.length <= 0) {
  FMS.stores.offlineTodo.load();
}