lachang/app/common/model/kjactivity/KjActivityGood.php

<?php

declare (strict_types=1);

namespace app\common\model\kjactivity;

use app\common\model\Goods;
use app\common\model\GoodsSku;
use app\common\model\BaseModel;

/**
 * 活动中心 ▸ 砍价活动商品
 * Class Ad
 * @package app\common\model
 */
class KjActivityGood extends BaseModel
{
   
    protected $name = 'kj_activity_goods';

    protected $append = ['residue_stock'];

    public function getResidueStockAttr($value,$data){
        if(isset($data['limit_stock']) && isset($data['purchase_stock'])){
            $residue_stock = $data['limit_stock']-$data['purchase_stock'];
            return $residue_stock>0?$residue_stock:0;
        }
        return 0;
    }

    /**
     * 一对多关联商品表
     */
    public function activity(){
        return $this->belongsTo('kj', 'id','activity_id');
    }

    public function add($activity_id, $data){
        // 先删除全部
        static::deleteAll(['activity_id' => $activity_id]);
        if (!empty($data)) {
            // 添加
            $dataset = [];
            foreach ($data as $item) {
                // 商品信息
                $goodsInfo = Goods::detail($item['goods_id']);
                if (empty($goodsInfo)) {
                    $this->error = "商品信息错误";
                    return false;
                }
                if($item['low_price']>=$goodsInfo['goods_price_min']){
                    $this->error = '活动最低价不能大于商品价格';
                    return false;
                }
                $dataset[] = [
                    'activity_id' => $activity_id,
                    'goods_id' => $item['goods_id'],
                    'limit_stock' => $item['limit_stock'],
                    'goods_sku_id' => 0,
                    'low_price'=>$item['low_price'],
                    'help_kj_up_cnt'=>$item['help_kj_up_cnt'],
                    'goods_sku_no'=>$goodsInfo['goods_no']
                ];
            }

            (new static)->addAll($dataset);

            return true;
        }
    }
}