Issue with removing records (unset) from data array in afterFind

Hi All

I'm experiencing a problem that I can't unset records from the data[] in the afterFind callback when the model a related model.
To show my issue clearly I've add this aferFind function to a model (assume I'd like to filter all returned records out for some reason):

public function afterFind($results, $primary = false) {
  $results = parent::afterFind($results, $primary);
  unset($results[0]);
  return $results;
}

This works fine for primary models, however not for related models (record is not unset).
I've traced it back to this part of the _filterResults function in DBOSource.php:

1128    foreach ($results as &$result) {
1129         $data = $linkedModel->afterFind(array(array($className => $result[$className])), false);
1130         if (isset($data[0][$className])) {
1131             $result[$className] = $data[0][$className];
1132         }
1133     }

Line 1130 just ignores the record unset since $data[0][$className] is not set - it was just unset!

If I change the code like this, it works for both primary and related:

1128    foreach ($results as $key => &$result) {
1129         $data = $linkedModel->afterFind(array(array($className => $result[$className])), false);
1130         if (isset($data[0][$className])) {
1131             $result[$className] = $data[0][$className];
1132          else {
1134            unset($results[$key]);
1135        }
1133     }

Am I doing something wrong or is this a cake issue?

Thanks!
Kevin

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