Problem with mapping in JsonStore

[gadus]

Hi everyone,
I have the following problem. I'm trying to consume ajax response in the folowing JSON format:

{
    "message": "Something good happened on the server!", 
    "data": [
        {
            "created_at": "2009-12-18 17:04:12", 
            "abstract": "Some abstract", 
            "state": {
                "id": 5, 
                "name": "Published"
            }, 
            "title": "Some title"
        }]
}

Javascript code responsible for consuming this response looks like this:

var store = new Ext.data.JsonStore({
	proxy: new Ext.data.HttpProxy({
             url: 'some_url',
	     method: 'GET'
       }),
       root: 'data',
       fields: [
             'title',
	     'abstract',
	     {name:'created_at', type:'date'},
	     {name: 'state', mapping: 'state.name' }
       ]
});

When I do not make mapping for "state" field everything is OK, but with above mapping loading store loads no records without any error.

[Mike Robinson]

If you look in JsonReader at the method "getJsonAccessor," you see there the code that is used to obtain the value. You can see that the function (closure...) it returns contains a try..catch statement which will silently absorb any errors.

This is the place where you need to try to point your debugger... looks like it won't be easy.

[Condor]

You probably need:

{name: 'state', mapping: 'state', convert: function(v){return v ? v.name : null;}}

(this won't fail if no state is present)

[gadus]

It works!!! Many thanks Condor. I've tested both options ('mapping' and 'convert') but separately, that's why it didn't work.

[nak1]

So what if we're mapping to an array within an object: {
name: 'address_address',
mapping: 'address.address[0].street',
convert: function(v){
return v ? v.address.address[0].street : null;

}
}

I still get this error even when I do have a convert function defined. Is there a fix for this?

[Condor]

That should be:

{
  name: 'address_address',
  mapping: 'address',
  convert: function(v){
    return v && v.address && v.address[0] ? v.address[0].street : null;
  }
}

(are you sure it's address.address?)

[nuzahat sayyed]

Hi Guys.
I am facing a problem in sencha while mapping Ext.data.JsonStore model using Ext.data.JsonReader.


Json response from server (server model):
{"rows":[{"id":1,"firstname":"Bill"},{"id": 2,"firstname":"Ben"}]}


Model used in Json Store:
Ext.regModel( 'mycabinet', {
fields: [
{ name : 'DeviceId', type: 'int' },
'CabinetName']
});




json Reader code:
var iccDeviceReader = new Ext.data.JsonReader({
// metadata configuration options:
idProperty: 'id',
root: 'rows',
fields: [
{name: 'CabinetName', mapping: 'firstname'},
{name:'DeviceId',mapping:'id'}
]
});


json store code:
app.iccDS = new Ext.data.JsonStore( {
model : 'mycabinet',
sorters : 'CabinetName',
getGroupString : function(record) { return record.get('CabinetName')[0]; },
proxy : {
type: 'ajax',
url : '/icc/js/data.js',
reader:iccDeviceReader
},
autoLoad: true
} );


I am expecting that "mycabinet" model will get populated with "server model". However, mapping doesnt occur.
I even tried using convert without any success(name:'DeviceId',mapping:'id',convert: function(v){return v.id;})


Any help will be highly appreciated.
Thanks

[carol.ext]

There is a forum for sencha touch issues.