How do I export numeric data with JSON:API?

Question

All the data exported is formatted with a string. Enclosed with quotes.

I'd like excluded_id to be numeric. The current state is the following.

[
 {
  "pending_id": "1234",
  "excluded_id": "111",
}]

I'd like the format to be the following.

[
 {
  "pending_id": 1234,
  "excluded_id": 111,
}]

The JSON service is implemented as a REST plugin. The normalizer is the following.

use Drupal\serialization\Normalizer\NormalizerBase;

class CBIBondTableDataNormalizer extends NormalizerBase {
  protected $supportedInterfaceOrClass = 'Drupal\cbi_dms_data\data\model\CBIBondTableResultData';

  public function normalize($object, $format = NULL, array $context = []) {
   return $object->normalize();
  }
}

With the normalizer.

class MyTableResultData implements MyTableResultType {

  public $row = [];

  public function __construct() {}

  public function addSqlResult($object) {
    $result = new CBIBondTableResult($object);
    $this->row[] = $result;
  }

  public function normalize() {
    $output = [];
    foreach ($this->row as $currentRow) {
      $output[] = (object) $currentRow;
    }
    return $output;
  }
}

I've tried setting the type in MyTableResultData.

public int $PendingID;

This doesn't work as PHP 7 doesn't allow something to be an integer or null.

Answer 1

Converting the value to integer helps

$int_value = intval($value);
if (strval($int_value) == $value) {
  $value = $int_value;
}
$this->$key_camel = $value;

I wrote it this way as I was concerned with null. Doesn't seem to be a problem.