分类数组进行切分

  //测试叶子节点
    public function trees(){
        $result = AliexpressCategories::where(‘state‘, 1)->get([‘cate_id‘, ‘ali_cate_id‘, ‘ali_cate_parent_id‘, ‘isleaf‘])->toarray();
        $leafData = [];
        $allData = [];
        if (!empty($result) && is_array($result)) {
            foreach ($result as $k => $v) {
                if ($v[‘isleaf‘]) { //是否为叶子节点
                    $leafData[$v[‘ali_cate_id‘]] = $v;//把目录id所为key值。对应数据作为value值
                } else {
                    $allData [$v[‘ali_cate_id‘]] = $v;
                }
            }
            unset($result);
            $this->data = $allData;
//            unset($allData);
            foreach ($leafData as $cateId => &$item) {
                $trees = $this->getAttrTree($item);//找这个节点的上级数组，
                var_dump($trees);die;
                if (!empty($trees)) {
                    $item[‘aliexpress_tree‘] = implode(",", array_reverse(explode(‘,‘, $trees)));
                    $item[‘updated_at‘] = date(‘Y-m-d H:i:s‘);;
                }
            }
        $object = (new AliexpressCategories());
 //collect->chunk(100) 将集合拆成多个给定大小的较小集合： 把数组切割成多个数值，然后进行遍历，避免数据太大，请求超时
            foreach (collect($leafData)->chunk(100) as $child_collect) {
                $object->updateBatch($child_collect->toArray());
            }
            return true;
        }
    }
//方法获取节点对应上级

function getAttrTree($item, $tree = ‘‘)
{
    $cateTree = $tree ? ($tree . ‘,‘ . $item[‘ali_cate_id‘]) : $item[‘ali_cate_id‘];
    if ($item[‘ali_cate_parent_id‘] && isset($this->data[$item[‘ali_cate_parent_id‘]])) {
        return $this->getAttrTree($this->data[$item[‘ali_cate_parent_id‘]], $cateTree);
    }
    return $cateTree;
}