Migracion de subgrupos

<?php

use Illuminate\Database\Migrations\Migration;

use Illuminate\Database\Schema\Blueprint;

use Illuminate\Support\Facades\Schema;

return new class extends Migration

{

    /**

     * Run the migrations.

     */

    public function up(): void

    {

        Schema::create('subgrupos', function (Blueprint $table) {

            $table->id();

            $table->string('nombre');

            $table->unsignedBigInteger('grupo_id')->nullable();

            $table->unsignedBigInteger('subgrupo_id')->nullable();

            $table->foreign('grupo_id')->references('id')->on('grupos')->nullable();

            $table->foreign('subgrupo_id')->references('id')->on('subgrupos')->nullable();

            $table->timestamps();

        });

    }

    /**

     * Reverse the migrations.

     */

    public function down(): void

    {

        Schema::dropIfExists('subgrupos');

    }

};