leezard/database/migrations/2023_12_11_110000_create_courses_table.php

<?php

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

return new class extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('courses', function (Blueprint $table) {
            $table->id();
            $table->unsignedBigInteger('parent_id')->nullable();
            $table->foreign('parent_id')->nullable()->references('id')->on('courses')->onUpdate('cascade')->onDelete('cascade');
            $table->unsignedBigInteger('category_id')->nullable();
            $table->foreign('category_id')->nullable()->references('id')->on('categories')->onUpdate('cascade')->onDelete('cascade');
            $table->string('name');
            $table->integer('enabled')->default(1);
            $table->softDeletes();
            $table->timestamps();
        });
    }

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