laravel-edu/database/migrations/2020_10_26_141826_add_user_to_tasks.php

<?php

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

class AddUserToTasks extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('tasks', function (Blueprint $table) {
            $table->integer('user_id')->unsigned()->default(1);
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('tasks', function (Blueprint $table) {
        });
    }
}