infantServiceApi/app/model/api/StoreCategory.php

<?php
declare (strict_types = 1);

namespace app\model\api;

use think\Model;

/**
 * @mixin \think\Model
 */
class StoreCategory extends Model
{
    protected $name = 'store_category';

    /**
     * 获取分类列表
     * @param array $where
     * @param int $page
     * @param int $pageSize
     * @return array
     */
    public function getList($where = [], $page = 1, $pageSize = 20)
    {
        $query = $this->where($where);
        $totalCount = $query->count();
        $list = $query
            ->order('sort', 'desc')
            ->order('id', 'desc')
            ->page($page, $pageSize)
            ->select()
            ->toArray();
        return [
            'list' => $list,
            'totalCount' => $totalCount,
            'pageSize' => $pageSize,
            'page' => $page
        ];
    }

    /**
     * 获取树形分类
     * @param int $pid
     * @return array
     */
    public function getTree($pid = 0)
    {
        $list = $this->where('pid', $pid)->order('sort', 'desc')->select()->toArray();
        foreach ($list as &$item) {
            $children = $this->getTree($item['id']);
            if (!empty($children)) {
                $item['children'] = $children;
            }
        }
        return $list;
    }
}