Ext 4.0.2a MemoryProxy with grouping feature

**HTK** · 19 Aug 2011 12:04 AM

Hi! I have written simple code for a model with no associations or validations. If I create a store now, which has summary grouping feature and a memory proxy I get an error while adding a new model instance to my store. He throws :

Code:

me.summaryGroups[index - 1] is undefined

in GroupingSummary.js at printData function. Does anyone know what causes this problem ? It is just simple configuration of model and store. Any suggestions?

**raz0r1** · 19 Aug 2011 12:14 AM

next time please post a line number and a small example code so someone who wants to help does have less work to find what you meen.

your problem:
it seems like you are not defining any groups in your store:
http://docs.sencha.com/ext-js/4-0/#/...thod-getGroups

**HTK** · 19 Aug 2011 12:26 AM

Thanks, for your answer. No, that´s of course not my problem. I´ll try to post example code later the day.

**HTK** · 19 Aug 2011 12:51 AM

Code:

Ext.define('WST.model.ReservationItem', {
    extend: 'Ext.data.Model',
    fields: [
        { name: 'id', type: 'int', useNull: true },
        { name: 'reservationId', type: 'int', useNull: true },
        { name: 'itemId', type: 'int', useNull: true },
        { name: 'itemType', type: 'string', useNull: true },
        { name: 'name', type: 'string' },
        { name: 'personName', type: 'string' },
        { name: 'personNumber', type: 'int', useNull: true },
        { name: 'count', type: 'int' },
        { name: 'price', type: 'float' }
    ]
});
// grid store
store: Ext.create('Ext.data.Store', {
    model: 'WST.model.ReservationItem',
    data: [],
    proxy: {
        type: 'memory',
        reader: {
            type: 'json'
        }
    },
    groupField: 'personName'
})

for (i = 0; i < 4; i++) {
                var record = Ext.create('WST.model.ReservationItem', {
                    'personName': i
                });
                store.add(record);
            }

I also tried initial data in the store. If I add records in a loop. For example 3 records. The first 2 get added. The last throws the error. And like I said. The error is thrown in GroupingSummary.js on line 162.

Thanks 4 help

**raz0r1** · 19 Aug 2011 1:52 AM

sorry but it seems like you have an issue anywhere else in your code.
follow works:

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
<link rel="stylesheet" href="extjs/resources/css/ext-all.css" />
<script type="text/javascript" src="extjs/ext-all-debug.js"></script>
<script type="text/javascript">
var store;
Ext.onReady(function(){
    Ext.define('WST.model.ReservationItem', {
        extend: 'Ext.data.Model',
        fields: [
            { name: 'id', type: 'int', useNull: true },
            { name: 'reservationId', type: 'int', useNull: true },
            { name: 'itemId', type: 'int', useNull: true },
            { name: 'itemType', type: 'string', useNull: true },
            { name: 'name', type: 'string' },
            { name: 'personName', type: 'string' },
            { name: 'personNumber', type: 'int', useNull: true },
            { name: 'count', type: 'int' },
            { name: 'price', type: 'float' }
        ]
    });
    // grid store
    store = Ext.create('Ext.data.Store', {
        model: 'WST.model.ReservationItem',
        data: [],
        proxy: {
            type: 'memory',
            reader: {
                type: 'json'
            }
        },
        groupField: 'personName'
    });


    
    for (i = 0; i < 4; i++) {
                    var record = Ext.create('WST.model.ReservationItem', {
                        'personName': i
                    });
                    store.add(record);




}});</script>
</head>
<body></body>
</html>

after that, execute "store.getGroupData()" in firebug. You get the right output

**HTK** · 19 Aug 2011 3:22 AM

I´ve found out that my records miss the index property. When I create a JSON Object and add that via store.loadData(record) it works and my records have an index property. I cannot see the reason for that behaviour

**raz0r1** · 19 Aug 2011 3:59 AM

thats interesting but without more code i could not help anymore.

maybe you can try something like this:

Code:

Ext.define('WST.store.ReservationItem', {
model: 'ReservationItem',
.................
});

Ext.create('Ext.grid.Panel', {
store: 'ReservationItem',
.......
});

I am not 100% sure but i think this only works if you have a controller that loads both store and model.

also try using root property of memory proxy.

Ext 4.0.2a MemoryProxy with grouping feature

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