<?php
    
    use yii\db\Migration;
    
    class m170503_134226_add_mask_column_to_page extends Migration
    {
        public function up()
        {
            $this->addColumn('page', 'mask', $this->integer());
        }
        
        public function down()
        {
            $this->dropColumn('page', 'mask');
        }
    }