ExtJS 3.4 checkboxgroup doesn't set value - extjs

Question

I get checked data string: "box0,box15,box30,box45"
Sencha docs says, I can set the value this way (checkboxes id and name are same like above)
// use comma separated string to set items with name to true (checked)
myCheckboxGroup.setValue('cb-col-1,cb-col-3');
I want to set true my boxes this way, but can't. Have you any idea about this?

Answer 1

This should work :
Ext.getCmp('MyCheckboxGroup').setValue({
cbxName: true,
cbxDescription: false
//cbxDescription: (condition) //you can always specify an condition here.
});
NOTE: cbxName, cbxDescription are the id's of checkboxes under MyCheckboxGroup, eg:
{
xtype: 'checkboxgroup',
fieldLabel: 'MyCheckboxGroup',
name: 'mycbxgrp',
columns: 2,
items: [
{ id: 'cbxName', boxLabel: 'Name', name: 'mycbxgrp', inputValue: 1 },
{ id: 'cbxDescription', boxLabel: 'Description', name: 'mycbxgrp', inputValue: 2 }
]
}

Answer 2

I'm not at work so i can't check my sources but i recall that it should be
cb-col-1 = Ext.getCmp(cb-col-1)
cb-col-3 = Ext.getCmp(cb-col-3)
myCheckboxGroup.setValue(cb-col-1 true);
myCheckboxGroup.setValue(cb-col-3, true);
if it is a component, and
Ext.get('cb-col-1').dom.value = true;
Ext.get('cb-col-3').dom.value = true;
if it is an element

Answer 3

When using setValue with a checkboxgroup you need to pass the checkbox field name:
Ext.create('Ext.form.CheckboxGroup', {
id: 'MyGroup',
items: [{
xtype:'checkbox',
name: 'check1'
},{
xtype: 'checkbox',
name: 'check2'
},{
xtype: 'checkbox',
name: 'checkset',
inputValue: 'val1'
},{
xtype: 'checkbox',
name: 'checkset',
inputValue: 'val2'
}]
});
Ext.getCmp('MyGroup').setValue({
check1: true,
check2: false,
checkset: ['val1', 'val2']
});
Literally lifted from the Sencha Docs