View file hrm-saas-2.5.7/script/database/migrations/2016_01_07_113732_add_referral_code_companies.php

<?php

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

class AddReferralCodeCompanies extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('companies', function(Blueprint $table)
        {
            $table->string('referral_code')->nullable();
//            $table->foreign('referral_code')
//                ->references('referral_code')->on('referral_member')
//                ->onUpdate('cascade')
//                ->onDelete('cascade');
        });
    }

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