Hi
ExtJS 3.4.0
I need to convert data to a different format and I'm attempting to do this by overriding the readRecords() method.
So far this code gives an error after the 'readRecords:' console message.
Any help or suggestions or links to samples would be appreciated.

Code:
readRecords:
TypeError: b is undefined
Code:
    var MyFields = Ext.data.Record.create([
        {name: 'id'},
        {name: 'name'}
    ]);

    MyReader = Ext.extend(Ext.data.ArrayReader, {
        fields: MyFields,

        readRecords: function(o) {
            console.log('readRecords:');
            MyReader.superclass.readRecords.apply(this, o); 
        }

    });

     MyStore = Ext.extend(Ext.data.ArrayStore, {
        reader: new MyReader()
    });