Django自定义分页并保存搜索条件

1、自定义分页组件pagination.py

import copyclass Pagination:    def __init__(self, current_page_num, all_count, request, per_page_num=10, page_count=11):        """        封装分页相关数据        :param current_page_num: 当前页码数        :param all_count: 数据库中总数据条数        :param per_page_num: 每页显示的数据量        :param page_count: 最大显示页数        """        try:            current_page = int(current_page_num)        except Exception as e:            current_page = 1        # 页码数小于1时显示第一页        if current_page < 1:            current_page = 1        # 取总页码数        self.all_page_count, temp = divmod(all_count, per_page_num)        if temp:            self.all_page_count += 1        # 页码数大于最大页码数时显示最后一页        if current_page > self.all_page_count:            current_page = self.all_page_count        self.current_page = current_page        self.per_page_num = per_page_num        self.half_page_count = int((page_count - 1) / 2)        # 总页码数小于最大页码数        if self.all_page_count < page_count:            self.start_page = 1            self.end_page = self.all_page_count + 1        else:            if self.current_page < self.half_page_count:                # 当页码条数据靠近最左边时                self.start_page = 1                self.end_page = page_count + 1            elif self.all_page_count - self.current_page < self.half_page_count:                # 当页码条数据靠近最右边时                self.start_page = self.all_page_count - page_count + 1                self.end_page = self.all_page_count + 1            else:                # 页码条正常显示在中间位置                self.start_page = self.current_page - self.half_page_count                self.end_page = self.current_page + self.half_page_count + 1        # 获取get参数: 
     
              params = request.GET        # 不进行deepcopy将无法改变其里面的值        self.new_params = copy.deepcopy(params)    @property    def start(self):        return (int(self.current_page - 1)) * self.per_page_num    @property    def end(self):        return int(self.current_page) * self.per_page_num    def show_html(self):        html_list = []        if self.current_page == 1:            first_page = '
      
{0}
'.format('首页')        else:            # 将page传入new-params中            self.new_params['page'] = 1            # 对new_params进行urlencode格式化: 'key=value&key2=value2&page=1'            first_page = '
      
{1}
'.format(self.new_params.urlencode(), '首页')        # 将"首页"html代码加入html_list中        html_list.append(first_page)        if self.current_page == 1:            prev_page = '
      
{0}
'.format('«')        else:            self.new_params['page'] = self.current_page - 1            prev_page = '
      
{1}
'.format(self.new_params.urlencode(), '«')        # 将"上一页"html代码加入html_list中        html_list.append(prev_page)        for i in range(self.start_page, self.end_page):            if self.current_page == i:                page_bar = '
      
{0}
'.format(i)            else:                self.new_params['page'] = i                page_bar = '
      
{1}
'.format(self.new_params.urlencode(), i)            # 将"每一页"html代码加入html_list中            html_list.append(page_bar)        if self.current_page == self.all_page_count:            next_page = '
      
{0}
'.format('»')        else:            self.new_params['page'] = self.current_page + 1            next_page = '
      
{1}
'.format(self.new_params.urlencode(), '»')        # 将"下一页"html代码加入html_list中        html_list.append(next_page)        if self.current_page == self.all_page_count:            last_page = '
      
{0}
'.format('尾页')        else:            self.new_params['page'] = self.all_page_count            last_page = '
      
{1}
'.format(self.new_params.urlencode(), '尾页')        # 将"尾页"html代码加入到html_list中        html_list.append(last_page)        return ''.join(html_list)
     

2、view视图

class CustomerView(View):    def get(self, request):        customer_list = Customer.objects.all()        page = request.GET.get('page')        # 实例化pagination对象        pagination = Pagination(page, customer_list.count(), request, per_page_num=1)        # 对数据列表进行分页        customer_list = customer_list[pagination.start:pagination.end]        context = {            'customer_list': customer_list,            'page_html': pagination.show_html()        }        return render(request, 'customer_list.html', context)    def post(self, request):        pass

3、templates模板

     
    
      
               {
    { page_html|safe }}     
      
     

4、页面展示