stark組件分頁開發

 

"""分頁組件"""class Pagination(object):    def __init__(self, current_page, all_count, base_url, query_params, per_page=20, pager_page_count=11):        """        分頁初始化        :param current_page: 當前頁碼        :param per_page: 每頁顯示數據條數        :param all_count: 數據庫中總條數        :param base_url: 基礎URL        :param query_params: QueryDict對象，內部含全部當前URL的原條件        :param pager_page_count: 頁面上最多顯示的頁碼數量        """        self.base_url = base_url        try:            self.current_page = int(current_page)            if self.current_page <= 0:                raise Exception()        except Exception as e:            self.current_page = 1        self.query_params = query_params        self.per_page = per_page        self.all_count = all_count        self.pager_page_count = pager_page_count        pager_count, b = divmod(all_count, per_page)        if b != 0:            pager_count += 1        self.pager_count = pager_count        half_pager_page_count = int(pager_page_count / 2)        self.half_pager_page_count = half_pager_page_count    @property    def start(self):        """        數據獲取值起始索引        :return:        """        return (self.current_page - 1) * self.per_page    @property    def end(self):        """        數據獲取值結束索引        :return:        """        return self.current_page * self.per_page    def page_html(self):        """        生成HTML頁碼        :return:        """        # 若是數據總頁碼pager_count<11 pager_page_count        if self.pager_count < self.pager_page_count:            pager_start = 1            pager_end = self.pager_count        else:            # 數據頁碼已經超過11            # 判斷： 若是當前頁 <= 5 half_pager_page_count            if self.current_page <= self.half_pager_page_count:                pager_start = 1                pager_end = self.pager_page_count            else:                # 若是： 當前頁+5 > 總頁碼                if (self.current_page + self.half_pager_page_count) > self.pager_count:                    pager_end = self.pager_count                    pager_start = self.pager_count - self.pager_page_count + 1                else:                    pager_start = self.current_page - self.half_pager_page_count                    pager_end = self.current_page + self.half_pager_page_count        page_list = []        if self.current_page <= 1:            prev = '<li><a href="#">上一頁</a></li>'        else:            self.query_params['page'] = self.current_page - 1            prev = '<li><a href="%s?%s">上一頁</a></li>' % (self.base_url, self.query_params.urlencode())        page_list.append(prev)        for i in range(pager_start, pager_end + 1):            self.query_params['page'] = i            if self.current_page == i:                tpl = '<li class="active"><a href="%s?%s">%s</a></li>' % (                    self.base_url, self.query_params.urlencode(), i,)            else:                tpl = '<li><a href="%s?%s">%s</a></li>' % (self.base_url, self.query_params.urlencode(), i,)            page_list.append(tpl)        if self.current_page >= self.pager_count:            nex = '<li><a href="#">下一頁</a></li>'        else:            self.query_params['page'] = self.current_page + 1            nex = '<li><a href="%s?%s">下一頁</a></li>' % (self.base_url, self.query_params.urlencode(),)        page_list.append(nex)        page_str = "".join(page_list)        return page_str