fastadmin_tailored/application/common/Service/Goods/CategoryService.php

<?php

namespace app\common\Service\Goods;

use app\common\model\Category;

class CategoryService
{
    /**
     * 获取栏目所有子级的ID
     * @param mixed $ids      栏目ID或集合ID
     * @param bool  $withself 是否包含自身
     * @return array
     */
    public static function getCategoryChildrenIds($ids, $withself = true)
    {
        // $cacheName = 'shop-childrens-' . $ids . '-' . $withself;
        // $result = Cache::get($cacheName);
        // if ($result === false) {
            $categoryList = Category::where('status', 'normal')
                ->order('weigh desc,id desc')
                ->select();

            $result = [];
            $tree = \fast\Tree::instance();
            $tree->init(collection($categoryList)->toArray(), 'pid');
            $CategoryIds = is_array($ids) ? $ids : explode(',', $ids);
            foreach ($CategoryIds as $index => $CategoryId) {
                $result = array_merge($result, $tree->getChildrenIds($CategoryId, $withself));
            }
        //     Cache::set($cacheName, $result);
        // }
        return $result;
    }

    /**
     * 根据分类ID获取分类信息
     * @param array $arrCategoryIds 分类ID集合
     * @return array
     */
    public static function getCategoryByIds($arrCategoryIds = []){
        $categoryList = Category::where('id', 'IN', $arrCategoryIds)
        ->where('status', 'normal')
        ->order('weigh desc,id desc')
        ->field('id,name,image,weigh,pid')
        ->select();
        $arrCategory = collection($categoryList)->toArray();
        return $arrCategory;
    }
    
}