LaravelApp/database/migrations/2025_12_04_000004_create_comments_table.php

<?php

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

return new class extends Migration
{
    public function up(): void
    {
        Schema::create('comments', function (Blueprint $table) {
            $table->id();
            $table->foreignId('submission_id')->constrained()->onDelete('cascade');
            $table->string('author', 100);
            $table->text('content');
            $table->timestamps();
            $table->softDeletes();
            
            $table->index('submission_id');
        });
    }

    public function down(): void
    {
        Schema::dropIfExists('comments');
    }
};