<?php

use think\migration\Migrator;
use think\migration\db\Column;

class AddVideoUrlTomaterialEnvice extends Migrator
{
    /**
     * Change Method.
     *
     * Write your reversible migrations using this method.
     *
     * More information on writing migrations is available here:
     * http://docs.phinx.org/en/latest/migrations.html#the-abstractmigration-class
     *
     * The following commands can be used in this method and Phinx will
     * automatically reverse them when rolling back:
     *
     *    createTable
     *    renameTable
     *    addColumn
     *    renameColumn
     *    addIndex
     *    addForeignKey
     *
     * Remember to call "create()" or "update()" and NOT "save()" when working
     * with the Table class.
     */
    public function change()
    {
        
        $this->table('material_evidence')
        ->addColumn('cover', 'string',['limit'  => 255,'comment'=>'视频封面图','null' => true,'default'=>''])
        ->addColumn('difference','integer', ['comment'=>'类型，1视频，2图片','default'=>2,'null'=>true])
        ->update();
    }
}