How can I access a store in an utility class?

[lovemyway]

Hello,

I've been developing some application using Sencha Touch 2 and I've encountered a little problem - I got a model:

Ext.define('STI.model.NotecaseMenu', {    extend: 'Ext.data.Model',
    
    config: {
        fields: [
            { name: 'fund', type: 'string' },
            { name: 'subfund', type: 'string' },
            { name: 'balance', type: 'float' },
            { name: 'registryNumber', type: 'string' },
            { name: 'productType', type: 'string' },
            { name: 'currency', type: 'string' },
            { name: 'distributor', type: 'string' },
            { name: 'openDate', type: 'string' },
            { name: 'registryState', type: 'string' },
            { name: 'unitValue', type: 'float' },
            { name: 'loss', type: 'float' },
            { name: 'bankAccount', type: 'string' }
        ]
    }
});

,

and a store:

Ext.define('STI.store.NotecaseMenuStore', {    extend: 'Ext.data.Store',
    
    config: {
        model: 'STI.model.NotecaseMenu',
        storeId: 'notecaseMenuStore',
        
        data: [
            { fund: 'Company FIO', subfund: 'AKCJA', balance: 5000.0, registryNumber: '700-025-689', productType: 'rejestr zwykły', currency: 'PLN', distributor: 'ProService AT',  openDate: '2006-11-14', registryState: '975,773 j.u.', unitValue: 329.00, loss: 222466.42, bankAccount: '26 1140 1010 7020 0002 0002 0000' },
            { fund: 'Company FIO', subfund: 'AKCJA', balance: 1544.0, registryNumber: '700-895-623', productType: 'rejestr zwykły', currency: 'PLN', distributor: 'ProService AT',  openDate: '2006-11-14', registryState: '5,53 j.u.', unitValue: 329.00, loss: 222466.42, bankAccount: '26 1140 1010 7020 0002 0002 0000' },
            { fund: 'Company FIO', subfund: 'WAGA', balance: 2045.0, registryNumber: '400-012-300', productType: 'rejestr zwykły', currency: 'PLN', distributor: 'ProService AT',  openDate: '2006-11-14', registryState: '75,72 j.u.', unitValue: 329.00, loss: 222466.42, bankAccount: '26 1140 1010 7020 0002 0002 0000' },
            { fund: 'Company FIO', subfund: 'WAGA', balance: 4288.0, registryNumber: '400-047-950', productType: 'rejestr zwykły', currency: 'PLN', distributor: 'ProService AT',  openDate: '2006-11-14', registryState: '773,554 j.u.', unitValue: 329.00, loss: 22246.642, bankAccount: '26 1140 1010 7020 0002 0002 0000' },
            { fund: 'Company FIO', subfund: 'WAGA', balance: 1234.5, registryNumber: '400-047-950', productType: 'rejestr zwykły', currency: 'PLN', distributor: 'ProService AT',  openDate: '2006-11-14', registryState: '773,554 j.u.', unitValue: 329.00, loss: 22246.642, bankAccount: '26 1140 1010 7020 0002 0002 0000' }
        ]
    }
});

Now, I want to write an utility function that will sum all the balance fields from the store and return a result. I was trying to write a function, and then get a store with Ext.getStore('notecaseMenuStore'), but it says it's undefined.

notecaseValue = function(){
    var store = Ext.getStore('notecaseMenuStore');
    var count = store.getCount();
    var sum = 0;


    for(i = 0; i < count; i++)
    {
        sum += store.getAt(i).data.balance;
    }
    
    return sum;
}

Where did I go wrong? Is there another way around? Should I define that utility class somehow?

Regards,
lovemyway

[mitchellsimoens]

Ext.getStore will work if the store has been created once somewhere either in the stores array in Ext.application or in a widget.

[lovemyway]

I have my store listed in Ext.application section and still got this problem. The problem disappears if I put a check in my util class:

var store = Ext.getStore('notecaseStore');
if(!store) {
store = Ext.create('STI.store.NotecaseStore');
}

but then the store is created two times (i was listening to load event in store and alert popped out twice), so I guess it's not right.

I'm trying to use this function in normal view class (defined in Ext.application too), in a panel (html: 'amount' + notecaseValue()). Is there any other way?