Can toArray be used to transform Eloquent relationships into JSON

Here's an example of how you can use `toArray()` to include related data:

php
// In your Post model
public function toArray()
{
    $array = parent::toArray();

    // Include the author's name in the array
    $array['author_name'] = $this->user->name;

    // Include the tags associated with the post
    $array['tags'] = $this->tags->toArray();

    return $array;
}

In this example, we're overriding the `toArray()` method in the `Post` model. We first call the parent `toArray()` method to get the default array representation of the model. Then, we add two additional keys to the array:

1. `author_name`: This includes the name of the user (author) associated with the post, by accessing the `name` property of the `user` relationship.
2. `tags`: This includes an array of all the tags associated with the post, by calling the `toArray()` method on the `tags` relationship.

Now, when you call `$post->toArray()` or return the post as a JSON response, you'll get an array that includes the post's attributes, the author's name, and the tags associated with the post.

This approach allows you to customize the data returned from your Eloquent models, including the related data from their relationships, to suit your specific needs, such as API responses or data transformations.

Remember that you can apply similar customizations to other Eloquent relationships, such as `hasMany`, `belongsTo`, `belongsToMany`, and so on, to include the desired related data in the array representation of your models.