snipe-it/database/migrations/2015_11_05_183749_image.php

<?php

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

class Image extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('assets', function (Blueprint $table) {
            $table->text('image')->after('notes')->nullable()->default(null);
            //
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('assets', function ($table) {
            $table->dropColumn('image');
        });
    }
}