<?php
    
    use yii\db\Migration;
    
    class m170607_100409_customer_add_social_id_column extends Migration
    {
        public function safeUp()
        {
            $this->addColumn('customer', 'social_id', $this->string());
        }
        
        public function safeDown()
        {
            $this->dropColumn('customer', 'social_id');
        }
    }