Unlimited hierarchical tree data structure in Laravel

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateCategoriesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('categories', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->integer('parent_id');
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('categories');
    }
}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    use HasFactory;

    // One level child
    public function child()
    {
        return $this->hasMany(Category::class, 'parent_id');
    }

    // Recursive children
    public function children()
    {
        return $this->hasMany(Category::class, 'parent_id')
            ->with('children');
    }

    // One level parent
    public function parent()
    {
        return $this->belongsTo(Category::class, 'parent_id');
    }

    // Recursive parents
    public function parents() {
        return $this->belongsTo(Category::class, 'parent_id')
            ->with('parent');
    }

    public function getPathAttribute()
    {
        $path = [];
        if ($this->parent_id) {
            $parent = $this->parent;
            $parent_path = $parent->path;
            $path = array_merge($path, $parent_path);
        }
        $path[] = $this->name;
        return $path;
    }

}

<link href="path/to/jquery.treetable.css" rel="stylesheet" type="text/css" />
<script src="path/to/jquery.treetable.js"></script>
<table id="category_table">
    @foreach($categories as $category)
        <tr data-tt-id="{{$category->id}}" 
            {{$category->parent_id ? "data-tt-parent-id={$category->parent_id}" : ""}}>
            <td>
                @if ($category->childs->isEmpty())
                    <input type="radio" id="category_id" name="category_id" value="{{$category->id}}">
                @endif
                {{ $category->name }}
            </td>
        </tr>
    @endforeach
</table>

<script>
    $("#category_table").treetable({ expandable: true });
</script>

<td>{{ implode(' > ', $category->path) }}</td>