Creating CheckBox for JSON Objects

Question

I am using extjs4,I need to add check box group based on my JSON Object,

JSON

{"Provider":[{"id":3,"name":"Beta House","npi":0,"taxId":0,
    "address":{
        "state":{"id":"1","stateName":"Alabama","code":"AL"},
    "zipcode":0,"country":"USA","email":"[email protected]"},
"type":"CP","LabProvider":[],"ListOfProvider":[]}]}

ExtJs Ext.define('providerList', { extend: 'Ext.data.Model', fields: ['id','name'] });

            var provider = Ext.create('Ext.data.Store', {
                model: 'providerList',
                autoLoad: true,
                proxy: {
                    type: 'ajax',
                    url : url+'/lochweb/loch/clinicalProvider/getAll',
                    reader: {
                        type: 'json',
                        root: 'Provider'
                    }
                }
            });

Panel

 var checkboxconfigs = [];
                provider.each(function(record) { 
                    checkboxconfigs.push(
                            {                   
                                boxLabel: 'record.id', 
                                name: 'record.name'
                            }) 
                    });


var checkboxes = new Ext.form.CheckboxGroup({  
            fieldLabel:'Providers',  
            columns:2,  
            items:checkboxconfigs
             });

var patientProvider = new Ext.FormPanel({       
                renderTo: "patientProvider",
                frame: true,                 
                title: 'Association',
                bodyStyle: 'padding:5px',           
                width: 500,
                items: [{
                    checkboxes                               
                        }],                     
            });

There is no check box in the form.How to populate checkbox from JSON store

Answer 1

You can define the items array before you use it as children of checkboxes. Each element of items array is created base on each record of the store.

var items = [];
provider.each(function(record) { items.push({boxLabel: 'up-to-you', name: 'up-to-you'}) }, );
var checkboxes = new Ext.form.CheckboxGroup({  
        fieldLabel:'Providers',  
        columns:2,  
        items:items
         });

Here you can determine the boxLabel and name for each checkbox (the attributes of record may be used as prefix, suffix...)

Answer 2

A couple of tips:

in the definition of panel items remove {} around checkboxes, like this:

                items: [ checkboxes ]

second, make sure that the store is available when you are populating checkboxes.

I have a similar situation in my app where store is available after panel is rendered. Panel is dynamically populated with list of checkboxes like this:

    panel.add(new Ext.form.CheckboxGroup({
        columns: 1,
        vertical: true,
        items: checkItems
    }));
    panel.doLayout();

EDIT: another tip:

remove qutoes '' from this code:

{                   
    boxLabel: 'record.id', 
    name: 'record.name'
}

or you will end up with all labels 'record.id'