Implement a DTO into a model in Magento

Before we create a repository interface, we can have our model implement our newly created DTO interface. Since we now have a Post data object defined, our model should conform to it. We’ll do that by making our model implement this new DTO interface.

Let’s open up our Post model, and tack on an implements PostInterface:

<?php

declare(strict_types=1);

namespace Macademy\Blog\Model;

use Macademy\Blog\Api\Data\PostInterface;
use Magento\Framework\Model\AbstractModel;

class Post extends AbstractModel implements PostInterface
{...