@classmethod
def mongo_find_pagenum(cls, collection, skip_num=0, page_size=10,
    sort_filter='c', sorttype=-1, find_filter={}, select_filter={}):
    """ mgdb find 页码翻页大礼包
        [必选]
        :collection: collection对象
        [可选]
        :skip: 跳过数目
        :page_size: 每页条目个数 默认:10条
        :sort_filter: 排序选项 默认根据 c 排序
        :sorttype: 1:正序 -1:倒序
        :find_filter: 查找过滤器字典 mongodb格式 例:{'s_id':123456}
        :select_filter: 选择过滤器字典 mongodb格式 例:{'or_id':1,'or_num':1}
        """
    total = collection().find(find_filter).count()
    if select_filter:
        cursor = collection().find(find_filter, select_filter).sort(sort_filter
            , sorttype).skip(skip_num).limit(page_size)
    else:
        cursor = collection().find(find_filter).sort(sort_filter, sorttype
            ).skip(skip_num).limit(page_size)
    return cursor, total
