zhongshen_project/addon/giftcard/model/CardStock.php

<?php
/**
 * Niushop商城系统 - 团队十年电商经验汇集巨献!
 * =========================================================
 * Copy right 2019-2029 杭州牛之云科技有限公司, 保留所有权利。
 * ----------------------------------------------
 * 官方网址: https://www.niushop.com
 * =========================================================
 */

namespace addon\giftcard\model;

use app\model\BaseModel;
use think\facade\Db;

/**
 * 库存 销量
 */
class CardStock extends BaseModel
{

    /**
     * 增加库存 减少销量
     * @param $param
     */
    public function incStock($param)
    {
        $condition = array (
            [ "id", "=", $param[ "card_id" ] ]
        );
        $num = $param[ "num" ];
        $card_info = model("giftcard")->getInfo($condition, "id,card_count,card_name");
        if (empty($card_info))
            return $this->error(-1, $card_info[ "card_name" ] . "不存在!");

        //编辑库存 销量
        model("giftcard")->setInc($condition, "card_count", $num);
        model("giftcard")->setDec($condition, "sale_num", $num);
        return $this->success();
    }

    /**
     * 判断库存
     * @param $param
     */
    public function checkStock($param)
    {

        $num = $param[ "num" ];
        $condition = array (
            [ "id", "=", $param[ "card_id" ] ]
        );
        $card_info = Db::name("giftcard")->where($condition)->field("id,card_count,card_name")->lock(true)->find();
        if (empty($card_info)) {
            return $this->error();
        }
        if ($card_info[ "card_count" ] < $num) {
            return $this->error('', $card_info[ "card_name" ] . "库存不足!");
        }

        return $this->success();
    }

    /**
     * 减少库存
     * @param $param
     */
    public function decStock($param)
    {

        $num = $param[ "num" ];
        $condition = array (
            [ "id", "=", $param[ "card_id" ] ]
        );
        $card_info = Db::name("giftcard")->where($condition)->field("id,card_count,card_name")->lock(true)->find();
        if (empty($card_info)) {
            return $this->error();
        }
        if ($card_info[ "card_count" ] < $num) {
            return $this->error('', $card_info[ "card_name" ] . "库存不足!");
        }
        //编辑库存 销量
        model("giftcard")->setDec($condition, "card_count", $num);
        model("giftcard")->setInc($condition, "sale_num", $num);

        return $this->success();
    }

}