screen/application/common/model/ProgrammeGoods.php

<?php

namespace app\common\model;

use app\common\service\InstallService;
use app\common\service\OrderService;
use think\Model;

/**
 */
class ProgrammeGoods extends Model
{
    protected $append=[
        'amount',
        'amount_install',
        'amount_total',
    ];
    public function skuObj(){
        return $this->belongsTo(GoodsSku::class,'sku_id');
    }
    public function getAmountAttr($_,$model){
        list($amount,$__,$single)=OrderService::getAmount($this['skuObj'],$this['skuObj']['goods'],$model['num']);
        return $single;
    }
    public function getAmountInstallAttr($_,$model){
        $single=InstallService::getFee([$model['sku_id']=>$model],'num_install',true);
        return $single;
    }
    public function getAmountTotalAttr($_,$model){
        return bcAddAll($this['amount']*$model['num'],$this['amount_install']*$model['num_install']);
    }
}