yuan/application/common/model/OfficeOrderModel.php

<?php

namespace app\common\model;

use think\Cache;
use think\Model;

/**
 * 办公室模型
 */
class OfficeOrderModel extends Model
{
    protected $name = 'office_order';

    public function office()
    {
        return $this->belongsTo('app\common\model\OfficeModel','oid','id');
    }
}