crm/app/model/ToolDecohelper.php

<?php

namespace app\model;

use think\Model;

class ToolDecohelper extends Model
{
    //
    /*
     * cover拼接
     */
    public function getCoverAttr($value)
    {
        if (empty($value)) return $value;
        $bindUrl = config('app.ali_oss_bindurl');
        return 'https://' . $bindUrl . '/' . $value;
    }
}