pixelfed/database/migrations/2018_04_18_021047_create_followers_table.php

<?php

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

class CreateFollowersTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('followers', function (Blueprint $table) {
            $table->increments('id');
            $table->bigInteger('profile_id')->unsigned();
            $table->bigInteger('following_id')->unsigned();
            $table->unique(['profile_id', 'following_id']);
            $table->timestamps();
        });
    }

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