<?php

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

class AddParentAlbumColumn extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('albums', function (Blueprint $table)
        {
            $table->unsignedInteger('parent_album_id')->nullable();
            $table->string('url_path')->nullable();

            $table->foreign('parent_album_id')
                ->references('id')->on('albums')
                ->onDelete('set null');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('albums', function (Blueprint $table)
        {
            $table->dropForeign('albums_parent_album_id_foreign');
            $table->dropColumn('parent_album_id');
            $table->dropColumn('url_path');
        });
    }
}