Laravel: Returning the namespaced owner of a polymorphic relation

Question

I can find a number of discussions regarding this but no clear solution. Here are two links, although I will cover everything in my own question here.

Github Issues<

Answer 1

In order for eager loading of polymorphic relations eg Photo::with('imageable')->get(); it's necessary to return null if type is empty.

class Photo extends Eloquent {

    protected $types = [
        'order' => 'App\Store\Order',
        'staff' => 'App\Users\Staff'
    ];

    public function imageable()
    {
        return $this->morphTo();
    }

    public function getImageableTypeAttribute($type) {
        // Illuminate/Database/Eloquent/Model::morphTo checks for null in order
        // to handle eager-loading relationships
        if(!$type) {
            return null;
        }

        // transform to lower case
        $type = strtolower($type);

        // to make sure this returns value from the array
        return array_get($this->types, $type, $type);

        // which is always safe, because new 'class'
        // will work just the same as new 'Class'
    }

}