如何实现分页功能

定义一个模块

from django.http.request import QueryDict

class Pagination:

    def __init__(self, page_num, all_count,params=None, per_num=10, max_show=11):
        """
        :param page_num:  当前的页码数
        :param all_count: 总数据量
        :param per_num:   每页显示的数据条数
        :param max_show:  最大显示页码数
        :param self.total_page_num:  总页码数
        :param self.page_start:  起始页码数
        :param self.page_end:    终止页码数

        """
        try:
            page_num = int(page_num)
            if page_num <= 0:
                page_num = 1
        except Exception as e:
            page_num = 1
        self.parmas = params if params else QueryDict(mutable=True)
        self.page_num = page_num
        self.all_count = all_count
        self.per_num = per_num
        total_page_num, more = divmod(all_count, per_num)
        if more:
            total_page_num += 1
        half_show = max_show // 2
        # 总页码数不足以满足最大页码数
        if total_page_num < max_show:
            page_start = 1
            page_end = total_page_num
        else:
            if page_num - half_show <= 0:
                page_start = 1
                page_end = max_show
            elif page_num + half_show > total_page_num:
                page_start = total_page_num - max_show + 1
                page_end = total_page_num
            else:
                page_start = page_num - half_show
                page_end = page_num + half_show

        self.page_start = page_start
        self.page_end = page_end
        self.total_page_num = total_page_num

    @property
    def page_html(self):
        page_list = []
        # 上一页
        if self.page_num == 1:
            page_list.append('<li class="disabled"><a ><span>&laquo;</span></a></li>')
        else:
            #  query=alex  page = 1
            self.parmas['page'] = self.page_num - 1
            page_list.append('<li><a href="?{}" ><span>&laquo;</span></a></li>'.format(self.parmas.urlencode()))

        for i in range(self.page_start, self.page_end + 1):
            #  query=alex  page = 1
            self.parmas['page'] = i
            if i == self.page_num:
                page_list.append('<li class="active"><a href="?{}">{}</a></li>'.format(self.parmas.urlencode(), i))
            else:
                page_list.append('<li><a href="?{}">{}</a></li>'.format(self.parmas.urlencode(), i))

        # 下一页
        if self.page_num == self.total_page_num:
            page_list.append('<li class="disabled"><a><span>&raquo;</span></a></li>')
        else:
            self.parmas['page'] = self.page_num + 1   # query:alex page:2   ——》 query=alex&page=2
            page_list.append('<li><a href="?{}" ><span>&raquo;</span></a></li>'.format(self.parmas.urlencode()))

        return ''.join(page_list)

    @property
    def start(self):
        return (self.page_num - 1) * self.per_num

    @property
    def end(self):
        return self.page_num * self.per_num

后端引用

page = Pagination(request.GET.get('page', '1'), all_customer.count(), request.GET.copy(), 2) 

?params=None

?request.GET.copy() 

#按照def __init__(self, page_num, all_count,params=None, per_num=10, max_show=11): 对应传参

前端引用

{{ page_html|safe }}  #自己加上自己喜欢的样式