yanzong/app/common/model/GoodsCategoryRel.php

<?php
// +----------------------------------------------------------------------
// | 萤火商城系统 [ 致力于通过产品和服务，帮助商家高效化开拓市场 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2017~2023 https://www.yiovo.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed 这不是一个自由软件，不允许对程序代码以任何形式任何目的的再发行
// +----------------------------------------------------------------------
// | Author: 萤火科技 <admin@yiovo.com>
// +----------------------------------------------------------------------
declare (strict_types=1);

namespace app\common\model;

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

/**
 * 商品与分类关系模型
 * Class GoodsCategoryRel
 * @package app\common\model
 */
class GoodsCategoryRel extends BaseModel
{
    // 定义表名
    protected $name = 'goods_category_rel';

    // 定义主键
    protected $pk = 'id';

    protected $updateTime = false;

    /**
     * 批量写入商品分类记录
     * @param int $goodsId 商品ID
     * @param array $categoryIds 分类ID集
     * @param int|null $storeId 商城ID
     * @return array|false
     */
    public static function increased(int $goodsId, array $categoryIds, int $storeId = null)
    {
        $dataset = [];
        foreach ($categoryIds as $categoryId) {
            $dataset[] = [
                'category_id' => $categoryId ?? 0,
                'goods_id' => $goodsId,
                'store_id' => $storeId ?: self::$storeId
            ];
        }
        return (new static)->addAll($dataset);
    }

    public static function getcategory(int $storeId = null,int $merchantId = null) {
        $where = [
            'b.store_id' => $storeId,
        ];
        if (!empty($merchantId)) {
            $where['a.merchant_id'] = $merchantId;
        }
        $list = Goods::alias('a')
                     ->rightjoin('goods_category_rel b', 'a.goods_id = b.goods_id')
                     ->where($where)->group('category_id')
                      ->select();
        return $list;
    }
}