thinkphp group分组示例

$this->where(['store_id' => self::$storeId,'status' => 10,'is_delete' => 0])
            ->field("user_id,imagetype")
              ->field("GROUP_CONCAT(
                         CONCAT(file_path)
                        separator',') AS imglist")
            ->group('user_id')
            ->order('create_time desc')
            ->paginate(10)
            ->each(function($item,$key){
                $item['imglist'] = $this->getImageUrl($item['imglist']);
            });