public function read($model, $name, &$dbValues, $transformatorClass = TransformatorInterface::class)
{
if (!$dbValues) {
$fieldMeta = ManganMeta::create($model)->field($name);
$model->{$name} = $fieldMeta->default;
return;
}
/**
* NOTE: Documents must be sorted as $dbRefs,
* however mongo does not guarantiee sorting by list of id's.
* This require sorting in php.
* If document has composite key this must be taken care too
* while comparision for sorting is made.
*/
$refs = [];
$unsortedRefs = [];
$pks = [];
$sort = [];
// Collect primary keys
foreach ($dbValues as $key => $dbValue) {
$dbValue['_class'] = DbRef::class;
$dbRef = $transformatorClass::toModel($dbValue);
// Collect keys separatelly for each type
$pks[$dbRef->class][$key] = $dbRef->pk;
$sort[$key] = $dbRef->pk;
}
// Fetch all types of db ref's en masse
$i = 0;
$unsortedPks = [];
foreach ($pks as $referenced => $pkValues) {
if (empty($referenced)) {
continue;
}
// Find all referenced documents
$refModel = new $referenced();
$found = (new RawFinder($refModel))->findAllByPk($pkValues);
if (!$found) {
continue;
}
foreach ($found as $document) {
// Collect unsorted documents
$unsortedRefs[$i] = $document;
// Collect pk's
$unsortedPks[$i] = PkManager::getFromArray($document, $refModel);
$i++;
}
}
// Find existing documents
$existing = [];
foreach ($model->{$name} as $key => $document) {
foreach ($sort as $i => $pk) {
if (PkManager::compare($pk, $document)) {
// Set existing document with key same as in sort
$existing[$i] = $document;
}
}
}
// Sort as stored ref
foreach ($sort as $key => $pk) {
foreach ($unsortedRefs as $i => $document) {
if (PkManager::compare($pk, $unsortedPks[$i])) {
if (array_key_exists($key, $existing)) {
// Update existing instance
$refs[$key] = $transformatorClass::toModel($document, $existing[$key], $existing[$key]);
} else {
// Create new instance
$refs[$key] = $transformatorClass::toModel($document);
}
}
}
}
$model->{$name} = $refs;
}
