tickme/database/migrations/2020_05_11_091333_create_comments_table.php

<?php

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

class CreateCommentsTable extends Migration
{

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('comments', function (Blueprint $table) {
            $table->id();
            $table->unsignedBigInteger('commentable_id');
            $table->string('commentable_type');
            $table->unsignedBigInteger('user_id');
            $table->string('comment');
            $table->timestamps();
            $table->softDeletes();
            $table->foreign('user_id')->references('id')->on('users');
        });
    }

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