Added ability to use owner key if provided to the morph relation

[alejojperez]

In Laravel Polymorphic relations, you can specify the owner key to the relation

protected function getResultsByType($type)
{
    $instance = $this->createModelByType($type);

    $key = $instance->getKeyName(); // <--- Before the change
    $ownerKey = $this->ownerKey ?? $instance->getKeyName(); // <---- After the change

    $query = $instance->newQuery();

    return $query->whereIn($ownerKey, $this->gatherKeysByType($type, $instance->getKeyType()))->get();
}

Checklist

• Add tests and ensure they pass
• Add an entry to the CHANGELOG.md file
• Update documentation for new features

[GromNaN]

That sounds correct to me. Could you add a test?

Tracking in PHPORM-226

[GromNaN]

I've tried to reproduce the error, but I can't find the condition in which the code you've fixed is called.

It seems to be with eager loading of relations, but I don't find how. Could you show an example of your model definition and your query?