pixelfed/database/migrations/2018_09_11_202435_create_activities_table.php

<?php

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

class CreateActivitiesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('activities', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->bigInteger('to_id')->unsigned()->nullable();
            $table->bigInteger('from_id')->unsigned()->nullable();
            $table->string('object_type')->nullable();
            $table->json('data')->nullable();
            $table->timestamp('processed_at')->nullable();
            $table->timestamps();
        });
    }

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