invoiceninja/app/Ninja/Transformers/VendorContactTransformer.php

<?php

namespace App\Ninja\Transformers;

use App\Models\VendorContact;

// vendor
class VendorContactTransformer extends EntityTransformer
{
    public function transform(VendorContact $contact)
    {
        return array_merge($this->getDefaults($contact), [
            'id' => (int) $contact->public_id,
            'first_name' => $contact->first_name ?: '',
            'last_name' => $contact->last_name ?: '',
            'email' => $contact->email ?: '',
            'updated_at' => $this->getTimestamp($contact->updated_at),
            'archived_at' => $this->getTimestamp($contact->deleted_at),
            'is_primary' => (bool) $contact->is_primary,
            'phone' => $contact->phone ?: '',
        ]);
    }
}