<?php use Illuminate\Support\Facades\Schema; use Illuminate\Database\Schema\Blueprint; use Illuminate\Database\Migrations\Migration; class AddParentColumnInLmsInstitute extends Migration { public function up() { Schema::table('lms_institutes', function ($table) { if (!Schema::hasColumn('lms_institutes', 'parent_id')) { $table->integer('parent_id')->nullable(); } }); } public function down() { // } }