Versioning trait for Laravel models

Post.php

<?php

namespace App;

use App\Traits\Versionable;
use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    use Versionable;

    /**
     * @var array
     */
    protected $fillable = ['title', 'body', 'status_id', 'user_id'];
}

PostVersion.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class PostVersion extends Model
{
    /**
     * @var array
     */
    protected $fillable = ['title', 'body', 'status_id', 'user_id', 'post_id'];
}

Versionable.php

<?php

namespace App\Traits;

use ReflectionClass;

/**
 * Save a copy of the model to the model's corresponding
 * "versions" table on create and update.
 *
 * Idea: Look into handling all model versioning with a
 * single db table that stores the attributes as json.
 *
 * Currently this trait requires manually creating the
 * corresponding model and database migration.
 */
trait Versionable
{
    /**
     * Boot the trait.
     *
     * @return void
     */
    public static function bootVersionable()
    {
        static::created(function ($model) {
            $model->snapshot();
        });

        static::updated(function ($model) {
            $model->snapshot();
        });
    }

    /**
     * Save a snapshot of the current model.
     *
     * @return void
     */
    protected function snapshot()
    {        
        $oidFieldName = $this->getOriginalIdFieldName();
        $class = $this->getVersionModelClassName();
        $class::create($this->toArray() + ['id' => null, $oidFieldName => $this->id]);
    }

    /**
     * Get the name of the foreign key field that references the original record.
     *
     * @example For a Post model, this returns "post_id" by default
     *
     * @return string
     */
    protected function getOriginalIdFieldName()
    {
        return strtolower((new ReflectionClass($this))->getShortName()) . '_id';
    }

    /**
     * Get the class name of the "version model".
     *
     * @example For an App\Post model, this returns "App\PostVersion" by default
     *
     * @return string
     */
    protected function getVersionModelClassName()
    {
        return get_class($this) . 'Version';
    }

    /**
     * This model can have many versions.
     *
     * @return Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function versions()
    {
        return $this->hasMany($this->getVersionModelClassName(), $this->getOriginalIdFieldName());
    }
}