tingwu/app/common/business/Demo.php

<?php
/**
 * Created by PhpStorm.
 * User: 97
 */

namespace app\common\business;

use app\common\model\mysql\Demo as mysqlDemo;

class Demo{

    /**
     * business 层通过 getDemoDataByCategoryId 来获取数据
     * @param $categoryId
     * @param int $limit
     * @return array
     */
    public function getDemoDataByCategoryId($categoryId,$limit = 10){
        $model = new mysqlDemo;
        $results = $model->getDemoDataByCategoryId($categoryId);

        if(empty($results)){
            return [];
        }
        $cagegorys = config("category");
        foreach ($results as $key=>$result){
            $results[$key]['categoryName'] = $cagegorys[$result['category_id']] ?? '--';
        }
        return $results;
    }
}