Phalcon validation messages on related (aliased) models - php

Question

Assuming I try to save the following data and the Songs model's name attribute has a Phalcon\Mvc\Model\Validator\PresenceOf validator set on it
// Get an existing artist
$artist = Artists::findFirst('name = "Shinichi Osawa"');
// Create an album
$album = new Albums();
$album->name = 'The One';
$album->artist = $artist;
$songs = array();
// Create a first song
$songs[0] = new Songs();
$songs[0]->name = 'Star Guitar';
$songs[0]->duration = '5:54';
// Create a second song
$songs[1] = new Songs();
$songs[1]->name = '';
$songs[1]->duration = '4:29';
// Assign the songs array
$album->songs = $songs;
// Save the album + its songs
if (!$album->save()) {
foreach ($album->getMessages() as $message) {
$message->getModel(); // this returns null since model is new
}
}
I will get an error message saying that 'name' is required.
Question: is there a built in way of getting the related model on which the error occurred (in this case $songs[1]), or at least the alias/index of the error model (in this case songs/1)?

Answer 1

Didn't find a built-in solution but came up with this.
Base model
public function beforeValidation()
{
$session = $this->getService('session');
if (!$session->has('model:validation')) {
$validation = $indexes = [];
} else {
$modelName = get_called_class();
$validation = $session->get('model:validation');
if (!isset($validation[$modelName])) {
$validation[$modelName] = 0;
$indexes = $session->get('model:validation:relationIndex');
$indexes[] = $modelName;
} else {
$validation[$modelName]++;
// reset child indexes
$indexes = $session->get('model:validation:relationIndex');
$modelIndex = array_search($modelName, $indexes);
for ($i = $modelIndex + 1; $i < count($indexes); $i++) {
$modelName = $indexes[$i];
unset($validation[$modelName]);
unset($indexes[$i]);
}
$indexes = array_values($indexes);
}
}
$session->set('model:validation:relationIndex', $indexes);
$session->set('model:validation', $validation);
}
Controller
$session = $this->getDI()->get('session');
$session->remove('model:validation');
$session->remove('model:validation:relationIndex');
if (!$this->save()) {
var_dump($session->get('model:validation:relationIndex'));
var_dump($session->get('model:validation'));
}