gistfile1.js

  _findRecord: function(recordType, id) {

    var storeKey ; 
    
    // if a record instance is passed, simply use the storeKey.  This allows 
    // you to pass a record from a chained store to get the same record in the
    // current store.
    if (recordType && recordType.get && recordType.get('isRecord')) {
      storeKey = recordType.get('storeKey');
      
    // otherwise, lookup the storeKey for the passed id.  look in subclasses 
    // as well.
    } else storeKey = id ? recordType.storeKeyFor(id) : null;
    
    if (storeKey && (this.readStatus(storeKey) === SC.Record.EMPTY)) {
      storeKey = this.retrieveRecord(recordType, id);
    }