The following error messages appear in dblog:

User error: "cache" is an invalid render array key in Drupal\Core\Render\Element::children() (line 103 of C:\xampp\htdocs\cia-drupal\docroot\core\lib\Drupal\Core\Render\Element.php)
User error: "view" is an invalid render array key in Drupal\Core\Render\Element::children() (line 103 of C:\xampp\htdocs\cia-drupal\docroot\core\lib\Drupal\Core\Render\Element.php)

Findings: Error is generated because is not of type array.

when $key = "cache", $value is of type Drupal\Core\Cache\CacheableMetaData
when $key = "view", $value is of type Drupal\views\ViewExecutable

Issue confirmed in environments:

1

PHP 8.2
Drupal Core 10.1.4
graphql 8.x-3.3
graphql_views 8.x-1.1

2

PHP 8.1.22
Drupal Core 10.1.2
graphql 8.x-3.1
graphql_views 8.x-1.1

Steps to reproduce:

Create a view
Add display of type graphql output
Reload view page with the graphql display selected or stay on page and click the "Update preview" button.

Consider:

Determine why $value is still an object instead of a render array

Patch core's Element.php which does not to cause any ill effects

foreach ($elements as $key => $value) {
  if (is_int($key) || $key === '' || $key[0] !== '#') {
    if (is_array($value)) {
      if (isset($value['#weight'])) {
        $weight = $value['#weight'];
        $sortable = TRUE;
      }
      else {
        $weight = 0;
      }
      // Supports weight with up to three digit precision and conserve
      // the insertion order.
      $child_weights[$key] = floor($weight * 1000) + $i / $count;
    }
    // Only trigger an error if the value is not null.
    // @see https://www.drupal.org/node/1283892
    // 
    // PATCHING CORE: !is_object check here.
    // 
    elseif (isset($value) && !is_object($value)) {
      trigger_error(new FormattableMarkup('"@key" is an invalid render array key', ['@key' => $key]), E_USER_ERROR);
    }
  }
  $i++;
}

drupal-graphql / graphql

Invalid render array key in Drupal\Core\Render\Element::children #1373

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